Operating system: MacOS Mojave 10.14.6 (18G95) | Darwin-18.7.0-x86_64-i386-64bit 64 Bits
Graphics card: AMD Radeon Pro 580X OpenGL Engine ATI Technologies Inc. 4.1 ATI-2.11.20
Broken: version: 2.90 (sub 0), branch: master, commit date: 2020-04-23 21:08, hash: rB826f6dd9ee20
Worked: (newest version of Blender that worked as expected)
Short description of error
When I click an object it flickers back and forth between transparent and preview and the edges look broken. Not sure if this is normal in 2.90a or an actual bug
Exact steps for others to reproduce the error
Basically create a mesh and start clicking the object in object mode, and edit mode, the faces, edges and vertices.