System Information
Operating system: Windows-10-10.0.19042-SP0 64 Bits
Graphics card: NVIDIA GeForce GTX 1070/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 472.12
Blender Version
Broken: version: 3.1.0 Alpha, branch: master, commit date: 2021-11-11 18:53, hash: rB0533f2851e7e
Worked: (newest version of Blender that worked as expected)
Open below file and go to material preview or render view. The checker doesn't appear on the objects which are created by geometry node instancing (whether instanced or not). Non of the outputs (generated, object, uv's, etc) have any effect.