win 8.1 gtx 970m
Broken: 2.80 (sub 37), branch: blender2.8, commit date: 2018-12-11 23:04, hash: ff108aac631
Rig (based on rigify) works fine for few days then all of a sudden it dissapears from viewport and outliner but animation stays safe.
running UI script again (included in file) has no effect either
Can't figure out what was the cause.
Can't redo it immediately but it happens for the second time already
Last result in attached file -