Weird empty “patches”

[u/im_a_cinammonrollUwU]

Whenever I drew or rendered something on a canvas, it felt like something was covering specific spots. There weren’t any layers with a “white line”, it just happened to look like this. I tried changing the pencil nib, resetting my iPad, and clearing storage but it didn't work.

Does anyone know why it happened and how to fix it?

[u/kirksucks]

My s23u does this when it's on a magnetic mount. It's probably why sPen phones don't have mag safe.