System Information
Operating system: Windows 10
Graphics card: RTX 2070 Q-Max

Blender Version
version: 2.91.0, branch: master, commit date: 2020-11-25 08:34, hash: 0f45cab862b8, type: Release
build date: 2020-11-25, 09:02:56
Worked: (newest version of Blender that worked as expected) unknown

Short description of error
Some materials, presumably only those with UV- maps and textures, change as the object moves by larger distances in world space, although in the whole setup there is no reference to location. So the material should be completely independent of its position in space.

As an example I have attached the eyes of a Makehuman character that move by 100 m over 1000 frames from their neutral position. I also noticed this phenomenon with other materials.

neutral position:

at distance:

Exact steps for others to reproduce the error

• open attached file
• switch to rendered view
• note eye material
• start simulation or go directly to frame > 700
• observe material change