System Information
Operating system: Windows-10-10.0.17763 64 Bits
Graphics card: GeForce GTX 1070/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 441.12
Blender Version
Broken: version: 2.81 (sub 16), branch: master, commit date: 2019-11-18 12:53, hash: rB115a5bf65a6b
Short description of error
smooth mask in sculpt mode produces artifacts.
Exact steps for others to reproduce the error
please check the video
thank you