After using edo494's strategy I can confirm that the system doesn't seem to be at fault; because even when they heal (at least to my knowledge) they create a "Your sound card is working perfectly" error.
After a few more test plays -- it still seems to be giving me the debug message even while the units are receiving heals -- unless I am not mistaking (Due to the nature of the trigger; it's a little difficult to test -- there's typically alot of fighting going on, due to the fact it's a Hero Defense. Combined with the unreproducible nature of the exploit; it makes for a very difficult problem)