System Information
Operating system: Windows-8.1-6.3.9600 64 Bits
Graphics card: GeForce GT 730/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 388.71
Blender Version
Broken: version: 2.81 (sub 1), branch: master, commit date: 2019-08-08 20:54, hash: rB4c9fe657458f
Short description of error
Loop selection don't work on some edges.
Exact steps for others to reproduce the error
Here on this mesh, if I try to use loop selection on edge 1, then edge 2 will not be selected. But if I try to use loop selection on edge 2, edge 1 will be selected. Seem like bug to me.
https://i.imgur.com/nwKoDPO.png