So this blue line randomly popped up whilst I was watching a movie on Prime Video. It follows my mouse and goes from the top of the video to the bottom. On further testing, it happens with Netflix and YouTube as well (The screenshot is from YouTube). It doesn't happen when I use the Prime Video app on my PC, nor with other browsers (I tested with Edge).
Any idea how to fix this? I read something about it being an issue with Switch Access (?), but that was an issue on a Chromebook and I have Windows 11.
So any ideas?