Hiya Dmitri!
Instead of trying to explain this in words, I thought I'd shoot a video.
I think there is a bug that is stopping the CC16 Midi data from being transmitted to host at higher hit speeds.
There is not a problem with Megadrum module in detecting the PS at higher speeds, I think it's just the transmission.
I see the LCD displaying the correct CC values at higher speeds, but as you can see the sent CC16 data is "sticking" on it's last known position after a certain interval threshold.
Any ideas?