diff --git a/changelog.d/14947.bugfix b/changelog.d/14947.bugfix
new file mode 100644
index 000000000..b9e768c44
--- /dev/null
+++ b/changelog.d/14947.bugfix
@@ -0,0 +1 @@
+Fix a long-standing bug where sending messages on servers with presence enabled would spam "Re-starting finished log context" log lines.
diff --git a/synapse/handlers/message.py b/synapse/handlers/message.py
index 6290f7f52..e688e0057 100644
--- a/synapse/handlers/message.py
+++ b/synapse/handlers/message.py
@@ -1939,7 +1939,9 @@ class EventCreationHandler:
             if event.type == EventTypes.Message:
                 # We don't want to block sending messages on any presence code. This
                 # matters as sometimes presence code can take a while.
-                run_in_background(self._bump_active_time, requester.user)
+                run_as_background_process(
+                    "bump_presence_active_time", self._bump_active_time, requester.user
+                )
 
         async def _notify() -> None:
             try: