Blender doesn't show materials and it has a model inside model effect thingy. Solid view works fine materials view doesn't show materials and rendered view shows this glitch effect thing (in EEVEE, in Cycles rendered view works fine but in materials view the cube is again blank).
Today i installed 2.91 and it still occurs. Any ideas on how to fix it?
Screenshot in rendered view:

Screenshot of when i scroll to zoom:


