Operating system: Windows 10 Home
Graphics card: NVIDIA GeForce GTX 960
Broken: 2.80, 26d5a3625ed, blender2.8, 2018-11-29 15:57

1. Select character.
2. Turn on 'Adjust edit cage to modifier results'
3. Switch between Object Mode / Edit Mode
4. Turn off 'Adjust ...'

In fact if you start clicking 'Adjust ...' and switching Mode, Blender will stop.
On video I easly recreate it 3 times.