This bug is intermittent
The latest time it happens, all I did was change the text on a button in one of the activities and did a save.
But (in case this helps) when I would click the Restart button, it would restart the project on my device REALLY quick. But, after trying it a few times, then all of the sudden, it appears B4A finally goes through a full-compile, that when my change is reflected.
So, it seems that when this bug happens, a "restart" does not do a full compile and does something else that completes way faster then a full-compile.