fix: properly overwrite loaded state for partial loaded rooms

Otherwise invites, which get converted to normal rooms, might still have
old member events set in memory, that don't match the current state.

lib/src/client.dart

@@ -2463,6 +2463,10 @@ class Client extends MatrixApi {
           final importantOrRoomLoaded =
               eventUpdate.type == EventUpdateType.inviteState ||
                   !room.partial ||
+                  // make sure we do overwrite events we have already loaded.
+                  room.states[stateEvent.type]
+                          ?.containsKey(stateEvent.stateKey ?? '') ==
+                      true ||
                   importantStateEvents.contains(stateEvent.type);
           if ((noMessageOrNoEdit || editingLastEvent || consecutiveEdit) &&
               importantOrRoomLoaded) {