diff --git a/app/src/main/java/org/schabi/newpipe/player/playback/MediaSourceManager.java b/app/src/main/java/org/schabi/newpipe/player/playback/MediaSourceManager.java
index 85c852f57..e4cef8c5c 100644
--- a/app/src/main/java/org/schabi/newpipe/player/playback/MediaSourceManager.java
+++ b/app/src/main/java/org/schabi/newpipe/player/playback/MediaSourceManager.java
@@ -319,6 +319,7 @@ public class MediaSourceManager {
 
     private Observable<Long> getEdgeIntervalSignal() {
         return Observable.interval(progressUpdateIntervalMillis, TimeUnit.MILLISECONDS)
+                .observeOn(AndroidSchedulers.mainThread())
                 .filter(ignored ->
                         playbackListener.isApproachingPlaybackEdge(playbackNearEndGapMillis));
     }