System Information
Operating system: Windows 10 Pro
Graphics card: GeForce GTX1060

Blender Version
Broken: 2.80 Beta, blender2.8, 2018-11-29 Hash: 26d5a3625ed
(example: 2.79b release)
(example: 2.80, edbf15d3c044, blender2.8, 2018-11-28, as found on the splash screen)
Worked: (optional)

Short description of error
Doing a loop cut does not exit properly. It goes into an edge mode it appears, but when finished, does not allow selecting edges, faces etc...

Exact steps for others to reproduce the error
Based on the default startup or an attached .blend file (as simple as possible).

Start with default scene and cube. Go to edit mode and press 3 to go to face mode and select a face. Now press ctrl R to add a loop cut into the cube.

You can no longer select any faces. It appears to put it into edge mode after adding the loop, but you can’t even select edges or faces or anything. You next need to press 3 to select faces again. (or 2 to select edges).