System Information
Operating system: win7/win10
Graphics card: Geforce GTX 770

Blender Version
2.81 Windows 64 bit
August 21, 23:13:44 - 189aa32a3ac0

Short description of error

When i load a mesh with Uvs or when i open a mesh created in Blendre 2.80 official release, the Uvs in the Uv editor are red/orange like they were pinned or selected although they are not pinned nor selected
I've got random crashes when i enter edit mode and when the Uv editor is open.
It happens with this free curtain file : https://www.turbosquid.com/3d-models/classic-curtain-3d-x/1137011

When i merge this model with the default cube, i get rid of the display bug