Hi,
I'm sorry but i don't think that the problem it's on the N.I.N.A's side at all. I've used some filter wheel ASCOM drivers, i've write a couple of them myself, and i've never seen this behavior.
A think that i can't use EZCAP with ASCOM drivers, so i cannot test with it.
Is the ASCOM drivers source code avaliable somewere ?
Thank you very much