In addition to the disconnect problem I noticed that SGP was not changing filters for auto focusing. I had it set to change to L for focusing, but this wasn't happening. SGP used instead whatever filter was currently set. As you know with the QSI camera the filter wheel is integrated with the camera, and it's possible the disconnect was related to SGP getting confused about filters. Don't know that for sure, of course.
I ended up doing a bunch of things, perhaps where at least one of which will address my disconnect problem.
First, I updated from .23 to .24 beta as I had not done that yet. Interestingly there was a comment in the release notes that some older code had to be re-introduced to solve a QHY camera issue concerning filters, but I don't know if this has anything to do with the QSI disconnect problem I was having.
Second, I did a complete overhaul of the QSI drivers by removing them from the computer and then reinstalling them. This meant I had to reload filter definitions, and I noticed there had been a small discrepancy here before. Could that have been related?
Now I was able to quickly determine that my autofocus issue was fixed. SGP now changes to the L filter for autofocusing as I had originally set.
And I have not had disconnect issues for the past couple of nights. Hopefully this is fixed as well, but it's still possible my issue is still there but I have not yet repeated the conditions of the problem.
You may try reloading the QSI drivers. Good luck!