Help [Fixed] Scroll bar artifact stuck on screen (X Compact on Nougat)

Hi folks! I have a scroll bar stuck on my screen, can't seem to get rid of it. It's not burnt in - it's an LCD screen and the bar is hidden on the lock screen and when I pull down the notifications.. I've tried rebooting the phone, clearing app cache... Anyone have any advice?

For reference, it's a Sony X Compact running Nougat.