From 7defd4a02bed16a9c48e50f79c9a979050ee0b6c Mon Sep 17 00:00:00 2001
From: Bruno Windels <bruno@windels.cloud>
Date: Wed, 5 May 2021 17:10:31 +0200
Subject: [PATCH] ensure the sync is limited when rejoining without overlap

otherwise gap would be lost. The server should do this already,
but we're just ensuring it is, to be more robust.
---
 src/matrix/room/timeline/persistence/SyncWriter.js | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/matrix/room/timeline/persistence/SyncWriter.js b/src/matrix/room/timeline/persistence/SyncWriter.js
index 8e3d2527..6a7a920d 100644
--- a/src/matrix/room/timeline/persistence/SyncWriter.js
+++ b/src/matrix/room/timeline/persistence/SyncWriter.js
@@ -207,6 +207,10 @@ export class SyncWriter {
                 }
             }
         }
+        if (!timeline.limited) {
+            log.set("force_limited_without_overlap", true);
+            return Object.assign({}, timeline, {limited: true});
+        }
         return timeline;
     }