Sprite Editor can't create slice

For some reason when creating a new slice, it only creates a green outline, which when i try to move, or edit, moves and edits another slice. Not sure if this is a bug or a feature, but I can’t seem to fix it.
Here is a gif of the issue, I hope it visible:
171909-desktop-20201201-23100901.gif

Any help would be greatly appreciated!

Nevermind, updating Unity seemed to fix the bug