I noticed there is a quick flicker of the whole screen, and potentially a white line very quickly running through the middle of the screen, when I wake it up from the screen being off for a while. Is this normal?
Yep... I‘ve seen it on my 16” MBP too... like some digital noise. I think I‘ve also seen it happen sometimes when I connect my MBP to my dock (so that my computer gets connected to my external display)...