Index: firmware/App/Modes/ModeStandby.c
===================================================================
diff -u -ra1b8dbb69c4bd2f0cc22e62bede7015c9307d378 -r9dbab48958c9f85f212538b04eaa4582dbcc7c46
--- firmware/App/Modes/ModeStandby.c	(.../ModeStandby.c)	(revision a1b8dbb69c4bd2f0cc22e62bede7015c9307d378)
+++ firmware/App/Modes/ModeStandby.c	(.../ModeStandby.c)	(revision 9dbab48958c9f85f212538b04eaa4582dbcc7c46)
@@ -216,7 +216,7 @@
     if ( FILTER_FLUSH_DATA_PUBLISH_INTERVAL <= filterFlushPublishTimerCounter++ )
     {
         U32 const timeout = FILTER_FLUSH_TIME_MS / MS_PER_SECOND;
-        U32 const countdown = ( ( getMSTimerCount() - filterFlushStartTime ) / MS_PER_SECOND );
+        U32 const countdown = timeout - ( calcTimeSince( filterFlushStartTime ) / MS_PER_SECOND );
         filterFlushPublishTimerCounter = 0;
 
         broadcastFilterFlushData( timeout, countdown );