System Information
Operating system: Linux-5.3.0-59-generic-x86_64-with-debian-buster-sid 64 Bits
Graphics card: Quadro GP100/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 440.59
Blender Version
Broken: version: 2.90.0 Alpha, branch: master, commit date: 2020-07-06 08:27, hash: rB80393a0ebadc
Short description of error
When sculpting on an objects multiresolution modifier subdivision levels, the automasking options "Mesh Boundary" & "Face Sets Boundary" are not working.