just starting imaging last night and this really odd grid pattern appeared across the lower right. It gradually faded over a few lights, but concerned what it is an how to stop it.
I noticed it once before when taking test flats but thought it was a pattern from my Light Panel, but obviously not when showing up in a Sub frame here so must related to camera or image train. Nothing on lens or filter or on sensor glass I can see, so presumably something deeper. Camera ASI071MC pro. I'm in a fairly warm humid environ (25deg C last night). Dew Heater is on and camera cooled to -5deg C.
Any help to resolve appreciated.