Sculpting bug (HUMAN course)

Question Sculpting
Hello!
I'm in the middle of a HUMAN course. I have some weird bugs around mouth corner in sculpting mode. I can’t figure out why they happened and how to fix them. Also when I edit shape key it influences base mesh too and I have no idea why. Probably that is why this bug happend. 

File: https://drive.google.com/file/d/1iCa1NjH8O2KOmpUgetxxyKtOpAaNjiiu/view?usp=sharing

Sculpting bug.jpeg
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Reply
  • Martin Bergwerf replied

    Keep watching; this is a known bug.

    2 loves
  • Omar Domenech replied

    Yes as Martin says, as you progress Kent encounters this bug over and over and he tackles it to no end. Hopefully one day the Blender devs will fix that bug. 

    2 loves
  • okonn replied
    Thank you for your answers. The only fix i found in the course is duplicating mesh, deleting multiresolution from original object and then adding it again, subdividing and reshaping, which unfortunately didn't work for me. It just copied the mesh with bugs. His issue seems to be only with shape key mesh but mine affects also base mesh.