just played it again and to me nothing really felt off tbh, running on 191ms audio and 3ms video latency.
But these probably wont align with your needs, you can try to do the "calibration test" if you continue to have this problem, tho=)

If you're talking about how the bats seem to happen a half-beat later than what the melody suggests... that's just a quirk of the chart.
The bat's hit timing will either result in an extra hit where there shouldn't be one (kinda similar to what happens with the Blue Slimes on Impossible around the second half of the moment in question), or this "delayed" hit. You'll have to adjust your play style around it!

I feel like the bat’s timing is about half a beat behind the melody. But I understand now that it’s just a quirk of the chart, and still within the expected behavior of the game.
Thank you!

I know the bat you are talking about. always ruins my combos when I try it.

Originally posted by Cruduxy Pegg:

I know the bat you are talking about. always ruins my combos when I try it.

I don’t believe the bat’s timing discrepancy is intentional.
It’s likely that an unavoidable mismatch occurred.
I understand that adjusting the notes or the music timing would be difficult.