This is made worse by the fact that left analogue stick click and left alt both activate this mode. (please move it to a less used key!)
Play any game on PPPSSSPPP. Enable 30 FPS mode, then go back.
For it to swap back and forth without issues like it does in other emulators.
The sound breaks. Changing the game, device, resetting it, nothing will fix it. Restarting Tower unite is the only option. This basically means one accidental misclick of the button requires a full game restart to continue your game properly.