Hmm….
I had ongoing issues with PHD2 using the 120MM USB2 camera
Bought the 120MM-S USB3 camera and has been working flawlessly ever since
Which 120MM camera do you use ?
The older 120MM USB2 camera did have inherent connectivity and data flow problems ( ZWO offered a driver patch but I ditched the camera )
If your using the 120MM-S USB3 with a quality certified USB3 cable no longer than 1.5m ( eg Startech brand or similar ) then ignore this post
Cheers
Martin
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