Good morning,
I use a Wanderer Astro Flip Flat panel.
When I start a sequence of flat panels, at the end of the sequence the Flat panel stays on and I have to remember to turn it off. Can you check?
I believe this issue has been around for a long time, at least for me. For my workaround, I follow my flats with a bias frame. Once the bias frame starts the flat panel turns off. Not sure if this is the same issue as what I experience but following my flats with bias always turns my flat panel off.
Mark