I have also switched to stellarmate 64 on Raspberry Pi 4 with 8Gb and it worked correctly since the first time. Very happy with it.
The OS is $50 but I think it's worth it.
I'm having the same problems with the same camera ASI585MC. Astroberry recognizes the camera without problems but when taking pictures with it, the exposure fails.
Were you able to solve it with a nightly build?
Thank you very much and best regards