diff --git a/src/ui/web/session/room/TimelineList.js b/src/ui/web/session/room/TimelineList.js
index a5f75b7c..d350c708 100644
--- a/src/ui/web/session/room/TimelineList.js
+++ b/src/ui/web/session/room/TimelineList.js
@@ -41,6 +41,9 @@ export class TimelineList extends ListView {
     }
 
     async _loadAtTopWhile(predicate) {
+        if (this._topLoadingPromise) {
+            return;
+        }
         try {
             while (predicate()) {
                 // fill, not enough content to fill timeline