After Effects Clone stamp problem

[Pål Christian Aarø]

Hi, i am new here! It is rare that i cannot find a solution to a problem by googling it so here goes:

I have a problem with the clone stamp tool, where this square box shown in the gif appear around the area i am painting on, and when stop painting it dissapears.

Ive tried everything, resetting the preferences and so on. It only happens when i zoom in on the footage, if i fit to screen it does not show up.

This makes painting hard as i cannot see what i am doing!

https://i.gyazo.com/264a3e19389d6b58cc5ca2057ef16192.gif