System Information
Operating system: Darwin-18.7.0-x86_64-i386-64bit 64 Bits
Graphics card: AMD Radeon R9 M295X OpenGL Engine ATI Technologies Inc. 4.1 ATI-2.11.20

Blender Version
Broken: version: 2.83 (sub 15), branch: master, commit date: 2020-04-24 15:23, hash: rBa8441fc90086
Worked: (newest version of Blender that worked as expected)

Short description of error
In edit mode the selected object flickers and the vertices don't appear clearly as normal. Started with this build.

Exact steps for others to reproduce the error
Restored factory settings, enter edit mode and the default cube displays the problem.