Index: firmware/App/Modes/ModeTreatmentParams.c
===================================================================
diff -u -rf65557f45236336204b573c40646937edf01b054 -r75e1ae332d1446dddf9b8d4ce6e8317449c57d67
--- firmware/App/Modes/ModeTreatmentParams.c	(.../ModeTreatmentParams.c)	(revision f65557f45236336204b573c40646937edf01b054)
+++ firmware/App/Modes/ModeTreatmentParams.c	(.../ModeTreatmentParams.c)	(revision 75e1ae332d1446dddf9b8d4ce6e8317449c57d67)
@@ -7,8 +7,8 @@
 *
 * @file    ModeTreatmentParams.c
 *
-* @author  (last)      Sean Nash
-* @date    (last)      01-Aug-2022
+* @author  (last)      Michael Garthwaite
+* @date    (last)      19-Jan-2023
 *
 * @author  (original)  Sean Nash
 * @date    (original)  29-May-2020
@@ -276,6 +276,7 @@
  *************************************************************************/
 U32 execTreatParamsMode( void )
 {
+    HD_TREATMENT_PARAMS_MODE_STATE_T priorSubState = currentTreatmentParamsState;
     BOOL stop = isStopButtonPressed();
 
     if ( TRUE == stop )
@@ -300,6 +301,11 @@
 
     }
 
+    if ( priorSubState != currentTreatmentParamsState )
+    {
+        SEND_EVENT_WITH_2_U32_DATA( HD_EVENT_SUB_STATE_CHANGE, priorSubState, currentTreatmentParamsState );
+    }
+
     return (U32)currentTreatmentParamsState;
 }