This is something that happens only when I lock or wake the system (not on reboot). The user card in the center of the greeter (with a background image and user avatar) becomes blurry and takes up a weird aspect ratio. The cursor is also replaced by a 'X' and is sometimes lost altogether.
Unfortunately I don't have a screenshot as I can't figure out how to take a screenshot on the lock screen.
Is there a fix for this?
OS: elementary OS 5.1.3 Hera x86_64