This happens often but I have no steps to reproduce because it seems to happen randomly.
What happens is all selection views go away and I notice that the icons for zoom and pan turn black. I'll attach a screen shot. To fix it, I have to restart the application. I'll attach a screenshot that shows the blacked out icons.
System Information
Operating system: Darwin-19.0.0-x86_64-i386-64bit 64 Bits
Graphics card: Intel Iris Pro OpenGL Engine Intel Inc. 4.1 INTEL-14.2.16
Blender Version
Broken: version: 2.81 (sub 16), branch: master, commit date: 2019-11-20 14:27, hash: rB26bd5ebd42e3
Worked: (optional)
Short description of error
[Please fill out a short description of the error here]
Exact steps for others to reproduce the error
[Please describe the exact steps needed to reproduce the issue]
[Based on the default startup or an attached .blend file (as simple as possible)]

