I have 2 errors

Question 1: In order to sculpt a specific area, I turned on the automatic grid. However, when I used the move-brush and tried to smooth it afterwards, it became ineffective and caused the grid to become larger. But when I used the add-brush, drew something freely and then smoothed it again, it became effective once more.

Question 2: I’m not sure what brush I clicked on, but suddenly all of them disappeared. They only reappeared when I went back to the previous step.

This may not a bug. On no.1 maybe the dynamic topology of you’re smooth brush is on.

No.2 maybe, in the settings, the “hide panel” is on

  1. DynTopo is disabled for the Move tool.

  2. Depending on which object is selected, the set of tools available changes.