**Windows 10 1903**
Operating system: Windows-10-10.0.18362 64 Bits
Graphics card:Geforce Gtx 960 4GB
**Blender 2.80 - build from 9.06.2019**
Broken: version: 2.80 (sub 74), branch: blender2.7, commit date: 2019-06-08 13:24, hash: `rB81b68f7279cd`
Worked: (optional)
**unable to cut middle of the polygon face**
[before: i was able to cut in the middle of the polygon face,now - it is impossible for me{F7097594}]
**Exact steps for others to reproduce the error**
[Please describe the exact steps needed to reproduce the issue]
[Based on the default startup or an attached .blend file (as simple as possible)]