Hello Dante. Earok have been asked about the bug on eab. He investigated the engine and fixed a couple of them. Maybe it could benefits your great game ?
Yes, the issue with 3rd-party joystick adapters I'm on it, I uploaded a preliminary test version here:
https://www.mediafire.com/file/ipyh2eq2k0ji3zz/CastlevaniaAGA_attempt_joystick_f...
Thanks!