1 files changed, 4 insertions, 0 deletions
diff --git a/synapse/storage/databases/main/events.py b/synapse/storage/databases/main/events.py
index 37439f8562..8d9086ecf0 100644
--- a/synapse/storage/databases/main/events.py
+++ b/synapse/storage/databases/main/events.py
@@ -1710,6 +1710,7 @@ class PersistEventsStore:
             RelationTypes.ANNOTATION,
             RelationTypes.REFERENCE,
             RelationTypes.REPLACE,
+            RelationTypes.THREAD,
         ):
             # Unknown relation type
             return
@@ -1740,6 +1741,9 @@ class PersistEventsStore:
         if rel_type == RelationTypes.REPLACE:
             txn.call_after(self.store.get_applicable_edit.invalidate, (parent_id,))
 
+        if rel_type == RelationTypes.THREAD:
+            txn.call_after(self.store.get_thread_summary.invalidate, (parent_id,))
+
     def _handle_insertion_event(self, txn: LoggingTransaction, event: EventBase):
         """Handles keeping track of insertion events and edges/connections.
         Part of MSC2716.