System Information
Operating system: Windows-10-10.0.18362-SP0 64 Bits
Graphics card: GeForce GTX 1060 6GB/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 441.66
4k monitor (might be relevant)

Blender Version
Broken: version: 2.83 (sub 11), branch: master, commit date: 2020-03-27 00:47, hash: rBe1ee4dff8d65
Worked: (newest version of Blender that worked as expected)

Short description of error
When I try selecting any of the elements in edit mode selection becomes unresponsive when I try adding elements to selection.

Exact steps for others to reproduce the error

1. Open default empty scene.
2. Add a cube
3. Enter edit mode
4. Subdivide the cube using right click menu
5. Now using select tool as active tool, with selection box activated try selecting one loop
6. Now try adding another loop to selection <<it won't work on any loop type (vertex, edge or face)

note: Also noticed that alt + middle click+ drag became much harder to snap to certain view, almost impossible to snap.