oh huh, i just looked closer at your screenshot, you arent even talking about the same bug i had :P. on my computer, while the game said it was playing me bar 3 in the preview, the bar 4 audio was actually being played. this is the bug that is also in future levels for me, the early bars of the level after are also affected im pretty sure, im not sure what else. I assume this is a niche bug that only affects certain users