System Information
Operating system:Win 10 1809 \ Win 10 1703
Graphics card: GTX1060 \GTX 1080ti

Blender Version
Broken:blender-2.80.0-git.036ec5cae4f7-windows64
(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
1.Sometimes when i use the circle action in loop tools , the face inside the selected area will rotate to a strange direction.
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2.Sometimes when i use the circle action in loop tools , the selected vertices will be delected.
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Attached File:
.blend

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