How to remove the bug with the cursor? (PLAYERUNKNOWN'S BATTLEGROUNDS)

Something like this, it's obvious!
Seriously, I don't understand what you were hoping for, no screenshots or even a banal description of the bug. To understand this is a bug of game or bug of your personally systems, is not possible.

You're talking about the cursor which sometimes remains after closing the inventory/map ? Then, you just need to open and close the inventory/map.