diff --git a/src/domain/session/room/timeline/ReactionsViewModel.js b/src/domain/session/room/timeline/ReactionsViewModel.js
index bbd6bdf4..55e965a9 100644
--- a/src/domain/session/room/timeline/ReactionsViewModel.js
+++ b/src/domain/session/room/timeline/ReactionsViewModel.js
@@ -34,7 +34,7 @@ export class ReactionsViewModel {
                             this._map.update(key);
                         }
                     } else {
-                        this._map.add(key, new ReactionViewModel(key, annotation, 0, this._parentEntry));
+                        this._map.add(key, new ReactionViewModel(key, annotation, null, this._parentEntry));
                     }
                 }
             }
@@ -61,7 +61,7 @@ export class ReactionsViewModel {
                     this._map.update(existingKey);
                 }
             } else if (!hasPending) {
-                if (this._map.get(existingKey)._tryUpdatePending(0)) {
+                if (this._map.get(existingKey)._tryUpdatePending(null)) {
                     this._map.update(existingKey);
                 }
             }
@@ -109,11 +109,18 @@ class ReactionViewModel {
     }
 
     get count() {
-        return (this._annotation?.count || 0) + this._pendingCount;
+        let count = 0;
+        if (this._annotation) {
+            count += this._annotation.count;
+        }
+        if (this._pendingCount !== null) {
+            count += this._pendingCount;
+        }
+        return count;
     }
 
     get isPending() {
-        return this._pendingCount !== 0;
+        return this._pendingCount !== null;
     }
 
     get haveReacted() {
@@ -137,7 +144,10 @@ class ReactionViewModel {
     }
 
     toggleReaction() {
-        if (this.haveReacted) {
+        const havePendingReaction = this._pendingCount > 0;
+        const haveRemoteReaction = this._annotation?.me;
+        const haveReaction = havePendingReaction || haveRemoteReaction;
+        if (haveReaction) {
             return this._parentEntry.redactReaction(this.key);
         } else {
             return this._parentEntry.react(this.key);
diff --git a/src/domain/session/room/timeline/tiles/BaseMessageTile.js b/src/domain/session/room/timeline/tiles/BaseMessageTile.js
index db126432..c8602b83 100644
--- a/src/domain/session/room/timeline/tiles/BaseMessageTile.js
+++ b/src/domain/session/room/timeline/tiles/BaseMessageTile.js
@@ -123,15 +123,30 @@ export class BaseMessageTile extends SimpleTile {
         return true;
     }
 
-    react(key) {
-        return this._room.sendEvent("m.reaction", this._entry.annotate(key));
+    react(key, log = null) {
+        return this.logger.wrapOrRun(log, "react", log => {
+            // this assumes the existing reaction is not a remote one
+            // we would need to do getOwnAnnotation(Id) and see if there are any pending redactions for it
+            const pee = this._entry.getPendingAnnotationEntry(key);
+            const redaction = pee?.pendingRedaction;
+            log.set("has_redaction", !!redaction);
+            log.set("has_redaction", !!redaction);
+            if (redaction && !redaction.hasStartedSending) {
+                log.set("abort_redaction", true);
+                return redaction.pendingEvent.abort();
+            } else {
+                return this._room.sendEvent("m.reaction", this._entry.annotate(key), null, log);
+            }
+        });
     }
 
-    async redactReaction(key) {
-        const id = await this._entry.getOwnAnnotationId(this._room, key);
-        if (id) {
-            this._room.sendRedaction(id);
-        }
+    async redactReaction(key, log = null) {
+        return this.logger.wrapOrRun(log, "redactReaction", log => {
+            const id = await this._entry.getOwnAnnotationId(this._room, key);
+            if (id) {
+                this._room.sendRedaction(id, null, log);
+            }
+        });
     }
 
     _updateReactions() {
diff --git a/src/domain/session/room/timeline/tiles/SimpleTile.js b/src/domain/session/room/timeline/tiles/SimpleTile.js
index f4584bcf..8abcc57d 100644
--- a/src/domain/session/room/timeline/tiles/SimpleTile.js
+++ b/src/domain/session/room/timeline/tiles/SimpleTile.js
@@ -54,8 +54,7 @@ export class SimpleTile extends ViewModel {
 
     get canAbortSending() {
         return this._entry.isPending &&
-            this._entry.pendingEvent.status !== SendStatus.Sending &&
-            this._entry.pendingEvent.status !== SendStatus.Sent;
+            !this._entry.pendingEvent.hasStartedSending;
     }
 
     abortSending() {
diff --git a/src/matrix/room/sending/PendingEvent.js b/src/matrix/room/sending/PendingEvent.js
index a0e5f4f2..f1672448 100644
--- a/src/matrix/room/sending/PendingEvent.js
+++ b/src/matrix/room/sending/PendingEvent.js
@@ -116,6 +116,10 @@ export class PendingEvent {
     get status() { return this._status; }
     get error() { return this._error; }
 
+    get hasStartedSending() {
+        return this._status !== SendStatus.Sending && this._status !== SendStatus.Sent;
+    }
+
     get attachmentsTotalBytes() {
         return this._attachmentsTotalBytes;
     }
diff --git a/src/matrix/room/sending/SendQueue.js b/src/matrix/room/sending/SendQueue.js
index 914ee1fd..041b1aef 100644
--- a/src/matrix/room/sending/SendQueue.js
+++ b/src/matrix/room/sending/SendQueue.js
@@ -157,8 +157,8 @@ export class SendQueue {
     }
 
     async _removeEvent(pendingEvent) {
-        const idx = this._pendingEvents.array.indexOf(pendingEvent);
-        if (idx !== -1) {
+        let hasEvent = this._pendingEvents.array.indexOf(pendingEvent) !== -1;
+        if (hasEvent) {
             const txn = await this._storage.readWriteTxn([this._storage.storeNames.pendingEvents]);
             try {
                 txn.pendingEvents.remove(pendingEvent.roomId, pendingEvent.queueIndex);
@@ -166,7 +166,12 @@ export class SendQueue {
                 txn.abort();
             }
             await txn.complete();
-            this._pendingEvents.remove(idx);
+            // lookup index after async txn is complete,
+            // to make sure we're not racing with anything
+            const idx = this._pendingEvents.array.indexOf(pendingEvent);
+            if (idx !== -1) {
+                this._pendingEvents.remove(idx);
+            }
         }
         pendingEvent.dispose();
     }
@@ -359,4 +364,4 @@ export function tests() {
             await poll(() => !queue._isSending);
         }
     }
-}
\ No newline at end of file
+}
diff --git a/src/matrix/room/timeline/PendingAnnotations.js b/src/matrix/room/timeline/PendingAnnotations.js
index 6279070b..cb85aa5b 100644
--- a/src/matrix/room/timeline/PendingAnnotations.js
+++ b/src/matrix/room/timeline/PendingAnnotations.js
@@ -22,30 +22,33 @@ export class PendingAnnotations {
         this._entries = [];
     }
 
-    add(pendingEventEntry) {
-        const relation = getRelationFromContent(pendingEventEntry.content);
+    /** adds either a pending annotation entry, or a remote annotation entry with a pending redaction */
+    add(annotationEntry) {
+        const relation = getRelationFromContent(annotationEntry.content);
         const key = relation.key;
         if (!key) {
             return;
         }
         const count = this.aggregatedAnnotations.get(key) || 0;
-        //const addend = pendingEventEntry.isRedacted ? -1 : 1;
-        //this.aggregatedAnnotations.set(key, count + addend);
-        this.aggregatedAnnotations.set(key, count + 1);
-        this._entries.push(pendingEventEntry);
+        const addend = annotationEntry.isRedacted ? -1 : 1;
+        console.log("add", count, addend);
+        this.aggregatedAnnotations.set(key, count + addend);
+        this._entries.push(annotationEntry);
     }
 
-    remove(pendingEventEntry) {
-        const idx = this._entries.indexOf(pendingEventEntry);
+    /** removes either a pending annotation entry, or a remote annotation entry with a pending redaction */
+    remove(annotationEntry) {
+        const idx = this._entries.indexOf(annotationEntry);
         if (idx === -1) {
             return;
         }
         this._entries.splice(idx, 1);
-        const relation = getRelationFromContent(pendingEventEntry.content);
+        const relation = getRelationFromContent(annotationEntry.content);
         const key = relation.key;
         let count = this.aggregatedAnnotations.get(key);
         if (count !== undefined) {
-            count -= 1;
+            const addend = annotationEntry.isRedacted ? 1 : -1;
+            count += addend;
             if (count <= 0) {
                 this.aggregatedAnnotations.delete(key);
             } else {
@@ -66,4 +69,4 @@ export class PendingAnnotations {
     get isEmpty() {
         return this._entries.length;
     }
-}
\ No newline at end of file
+}
diff --git a/src/matrix/room/timeline/Timeline.js b/src/matrix/room/timeline/Timeline.js
index ecba1f2a..b567eff8 100644
--- a/src/matrix/room/timeline/Timeline.js
+++ b/src/matrix/room/timeline/Timeline.js
@@ -22,6 +22,7 @@ import {TimelineReader} from "./persistence/TimelineReader.js";
 import {PendingEventEntry} from "./entries/PendingEventEntry.js";
 import {RoomMember} from "../members/RoomMember.js";
 import {PowerLevels} from "./PowerLevels.js";
+import {getRelationFromContent} from "./relations.js";
 
 export class Timeline {
     constructor({roomId, storage, closeCallback, fragmentIdComparer, pendingEvents, clock}) {
@@ -101,20 +102,62 @@ export class Timeline {
         if (this._pendingEvents) {
             this._localEntries = new MappedList(this._pendingEvents, pe => {
                 const pee = new PendingEventEntry({pendingEvent: pe, member: this._ownMember, clock: this._clock});
-                this._applyAndEmitLocalRelationChange(pee.pendingEvent, target => target.addLocalRelation(pee));
+                this._onAddPendingEvent(pee);
                 return pee;
             }, (pee, params) => {
                 // is sending but redacted, who do we detect that here to remove the relation?
                 pee.notifyUpdate(params);
-            }, pee => {
-                this._applyAndEmitLocalRelationChange(pee.pendingEvent, target => target.removeLocalRelation(pee));
-            });
+            }, pee => this._onRemovePendingEvent(pee));
         } else {
             this._localEntries = new ObservableArray();
         }
         this._allEntries = new ConcatList(this._remoteEntries, this._localEntries);
     }
 
+    _onAddPendingEvent(pee) {
+        let redactedEntry;
+        this._applyAndEmitLocalRelationChange(pee.pendingEvent, target => {
+            const wasRedacted = target.isRedacted;
+            const params = target.addLocalRelation(pee);
+            if (!wasRedacted && target.isRedacted) {
+                redactedEntry = target;
+            }
+            return params;
+        });
+        console.log("redactedEntry", redactedEntry);
+        if (redactedEntry) {
+            const redactedRelation = getRelationFromContent(redactedEntry.content);
+            if (redactedRelation?.event_id) {
+                const found = this._remoteEntries.findAndUpdate(
+                    e => e.id === redactedRelation.event_id,
+                    relationTarget => relationTarget.addLocalRelation(redactedEntry) || false
+                );
+                console.log("found", found);
+            }
+        }
+    }
+
+    _onRemovePendingEvent(pee) {
+        let unredactedEntry;
+        this._applyAndEmitLocalRelationChange(pee.pendingEvent, target => {
+            const wasRedacted = target.isRedacted;
+            const params = target.removeLocalRelation(pee);
+            if (wasRedacted && !target.isRedacted) {
+                unredactedEntry = target;
+            }
+            return params;
+        });
+        if (unredactedEntry) {
+            const redactedRelation = getRelationFromContent(unredactedEntry.content);
+            if (redactedRelation?.event_id) {
+                this._remoteEntries.findAndUpdate(
+                    e => e.id === redactedRelation.event_id,
+                    relationTarget => relationTarget.removeLocalRelation(unredactedEntry) || false
+                );
+            }
+        }
+    }
+
     _applyAndEmitLocalRelationChange(pe, updater) {
         const updateOrFalse = e => {
             const params = updater(e);
diff --git a/src/matrix/room/timeline/entries/BaseEventEntry.js b/src/matrix/room/timeline/entries/BaseEventEntry.js
index 6e3254e8..b32494e8 100644
--- a/src/matrix/room/timeline/entries/BaseEventEntry.js
+++ b/src/matrix/room/timeline/entries/BaseEventEntry.js
@@ -42,7 +42,7 @@ export class BaseEventEntry extends BaseEntry {
     }
 
     /**
-        aggregates local relation.
+        aggregates local relation or local redaction of remote relation.
         @return [string] returns the name of the field that has changed, if any
     */
     addLocalRelation(entry) {
@@ -102,6 +102,13 @@ export class BaseEventEntry extends BaseEntry {
         }
     }
 
+    get pendingRedaction() {
+        if (this._pendingRedactions) {
+            return this._pendingRedactions[0];
+        }
+        return null;
+    }
+
     annotate(key) {
         return createAnnotation(this.id, key);
     }
@@ -111,7 +118,10 @@ export class BaseEventEntry extends BaseEntry {
     }
 
     async getOwnAnnotationId(room, key) {
-        const pendingEvent = this._pendingAnnotations?.findForKey(key);
-        return pendingEvent?.id;
+        return this.getPendingAnnotationEntry(key)?.id;
     }
-}
\ No newline at end of file
+
+    getPendingAnnotationEntry(key) {
+        return this._pendingAnnotations?.findForKey(key);
+    }
+}