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-rw-r--r--synapse/handlers/sliding_sync.py4
1 files changed, 2 insertions, 2 deletions
diff --git a/synapse/handlers/sliding_sync.py b/synapse/handlers/sliding_sync.py
index b4ecf87f2e..07545e9496 100644
--- a/synapse/handlers/sliding_sync.py
+++ b/synapse/handlers/sliding_sync.py
@@ -658,8 +658,8 @@ class SlidingSyncHandler:
                 to_token=to_token,
             )
 
-            # Filter out empty room results.
-            if room_sync_result:
+            # Filter out empty room results during incremental sync
+            if room_sync_result or not from_token:
                 rooms[room_id] = room_sync_result
 
         with start_active_span("sliding_sync.generate_room_entries"):