Polybrush stops working randomly depending on position of my camera.

Hey,

I'm currently trying to sculpt some objects that I created with Probuilder in Unity.
But the pointer which is used to sculpt objects doesn't show everywhere on the same object.
It disappear at some plays, and if I move the editor camera, these areas change.
Here is a little gif to show you the bug.
It may be just an option I didn't toggle but I don't know what.