docs: prepare P2P notification fix adoption

updates.md

@@ -12,6 +12,13 @@ Earlier releases remain available in the 1.0 release history, the 1.0 preview hi
 
 ## Unreleased
 
+### Fixed
+
+#### P2P synchronisation
+
+- Later P2P changes can continue to reach following devices when an earlier change notification was ignored before the peer was accepted. (#1247)
+    - Change notifications no longer wait for a reply from the receiving device. A missed final notification still requires a later change or explicit synchronisation.
+
 ## 1.0.49
 
 11th November, 2026