Hi

I have a detail view of a broken out section in an assembly drawing. I don't know if "phantom lines" are the correct term, but on the detail view, there are some lines that aren't visible on the broken out section and I don't know why they are there, because there are no edges. I also can't select these lines. To be clear: the 3 lines around the set set screw on the second picture shouldn't appear.

Then there's another thing: the line thickness of the broken out section can't be changed with the line thickness selection button. The line thickness stays the same, even if I change it to 0.18 or 2 mm.

(SOLIDWORKS 2019 SP 0.0)

I need to get rid of these lines, any solutions? Thanks.

EDIT: updating drivers didn't solve this.