System Information
Operating system: Windows-7-6.1.7601-SP1 64 Bits
Graphics card: GeForce GTX 1070/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 441.20

Blender Version
Broken: version: 2.81 (sub 16), branch: master, commit date: 2019-11-20 14:27, hash: rB26bd5ebd42e3

Short description of error

Rotate in orthographic mode from one of the views (front, side, left, top, bottom, etc) affect also other axis.
No problem with move.

Exact steps for others to reproduce the error
be sure to be in ortho mode, than go in front/side/top view and press R to rotate.

Please check the video to understand what I mean