Bug corrected:

Persistent homing message.
Message was declared as an alert, therefore it was persistent.
Updated to message.

Marlin/Marlin_main.cpp

     if (!READ(HOME_PIN)) {
       if (!homeDebounceCount) {
         enqueuecommands_P(PSTR("G28"));
-        LCD_ALERTMESSAGEPGM(MSG_AUTO_HOME);
+        LCD_MESSAGEPGM(MSG_AUTO_HOME);
       }
       if (homeDebounceCount < HOME_DEBOUNCE_DELAY)
         homeDebounceCount++;