Hi

I have the following devices connected to my MacBook Pro (with macOS Catalina):
- Astro-Physics Mount connected to INDI (USB-Serial)
- Focuslynx connected to INDI (USB-Serial)
- QHY367C connected to INDI (USB)
- QHY5-IIL connected to INDO (USB)
All devices are connected to two USB hubs which are connected to the Mac's Team Thunderbolt 3 connectors.

Starting Ekos is fine but then connecting the devices is always a bit of a lottery. The mount mostly is connected immediately, the focuser doesn't connect since a few days (but this is not the problem of this topic), the QHY5II-L connects mostly without problems, but the QHY367C makes problems. I usually have to disconnect the devices, restart Ekos and connect again. In 1 out of 10 tries, the QHY367C is connecting successfully.

I did not find a pattern to connected the QHY367C correctly. I assume it is a matter of where the camera is connected (on which USB Hub, with which other devices on the same hub), but as said, I didn't find a pattern yet.

The last two nights I have run into a new problem. Besides the usual connection problems, I cannot download anymore frames from the QHY367C. I took a 1s frame, the remaining exposure time field counted down to zero, the spinner next to the remaining exposure time doesn't stop spinning and the frame is not downloading. The FITS viewer never opens.
In the attached log file you see the log entries for the QHY367C. Theres is a message "Exposure timeout. Restarting exposure..." which points to the problem but I have no idea what creates the problem and how to solve it.
I noticed that as soon as I unplug the USB cable from the QHY376C, the FITS viewer opens immediately and the frame is displayed.

Does someone else has a similar problem and found a solution for it?

Thomas