Operating system: Windows-10-10.0.18362 64 Bits
Graphics card: GeForce GTX 1070/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 436.15
Broken: version: 2.81 (sub 9), branch: master, commit date: 2019-09-09 17:22, hash: rB6be3348505ce
Short description of error
Objects in a blend file made in 2.80 are shown with incorrect material in 2.81 (see above file)
Exact steps for others to reproduce the error
Load above file made with Blender version: 2.80 (sub 75), branch: master, commit date: 2019-07-29 14:47, hash: rBf6cb5f54494e in Blender 2.81 version as specified above and select "Material Preview" as Viewport shading. Wrong materials are shown. Then select all objects and and go into Edit mode and back to Object mode. Correct materials are now shown.