Operating system: Windows-10-10.0.19002 64 Bits
Graphics card: Radeon RX550/550 Series ATI Technologies Inc. 4.5.13571 Core Profile Context 19.10.1 26.20.13025.10004
Broken: version: 2.80~2.82 (sub 1), branch: master, commit date: 2019-10-23 16:40, hash: rB9aa1bb6388ac
Rigging: The foot bone IK generated by the rigify plugin has a distortion problem.
I recorded a video to reproduce the problem I encountered.
Error scenarios can be downloaded for attachment viewing.