Thanks for your tests.
The fix as been merged to the main repository.
I never had your capture issue with the SV305, but I had exactly the same problem with a QHY5. It looks like a USB power issue.
My USB power wasn't stable enough, the sensor's analogic/digital converter reference voltage swinged. I Fixed the issue by soldering a filter capacitor.
When do you expect the latest build will be incorporated into Astroberry/AstroDMx? I rather not attempt another build because my last one failed.