So, here is what it looks like when at a zoom level where it renders correctly:

And here is when I zoom in one level:

The section that appeared there is my home area, which has a waypoint set at it, and it is where I spend most of my time.

I have yet to figure out exact steps to reproduce. Perhaps a way to force it to refresh itself would be the best solution.

EDIT: I've noticed that this issue seems to be more common when sprint-flying through the world.

Update: Adjusting the zoom levels in the fullscreen map also messes with what the messed up section of minimap looks like. For example,


Same zoom level on the minimap, different zoom levels on the fullscreen map. Even if the fullscreen map is zoomed out enough to appear correctly, the minimap is still messed up in that section.

at what setting is the texturesize in general options?

Texturesize is 2048