System Information
Operating system: Windows-10-10.0.18362-SP0 64 Bits
Graphics card: GeForce GTX 1070 Ti/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 441.12

Blender Version
Broken: version: 2.91.0 Alpha, branch: master, commit date: 2020-09-07 08:12, hash: rBb351607996e4

Worked:
version: 2.91.0 Alpha, branch: master, commit date: 2020-09-01 07:02, hash: c78c4252669a, type: Release
build date: 2020-09-01, 06:13:57

Short description of error
Some refresh artifacts flashing when navigating in the workspace window.

Broken version:

Video capture:

Working version:

Exact steps for others to reproduce the error
Open file
Go to shader / node window.

Not sure if this is a bug, or is this my graphics card compatibility? (But it worked last week...so...)