Magebloom mapdevice flashes a black box occasionally

The Magebloom map device flashes this black box, about the size of it, covering it every like 1.5 seconds. The black box follows it around if I move it, so is definitively from magebloom.

It used to not do that, when I was opening white tier maps. Not that I noticed anyways.

I run on Intel Iris Xe, not a graphics card.
i7-1165G7
Vulkan.
All low settings, apart from 2x Anisotrophic Filtering.
Dynamic culling.
Dynamic Resolution.
Multithread.
Vsync.

Thanks