1 files changed, 4 insertions, 0 deletions
diff --git a/synapse/storage/databases/main/events.py b/synapse/storage/databases/main/events.py
index 0df8ff5395..28190bf6f5 100644
--- a/synapse/storage/databases/main/events.py
+++ b/synapse/storage/databases/main/events.py
@@ -1766,6 +1766,10 @@ class PersistEventsStore:
                 self.store.get_invited_rooms_for_local_user.invalidate,
                 (event.state_key,),
             )
+            txn.call_after(
+                self.store.get_local_users_in_room.invalidate,
+                (event.room_id,),
+            )
 
             # The `_get_membership_from_event_id` is immutable, except for the
             # case where we look up an event *before* persisting it.