Painter 2020 gets stuck with Layer Adjuster tool

Many times, for some reason, when using a brush the Layer Adjust will become active.  Changing brushes or tools using the Wacom pen has no affect.  However, if the mouse is used to reselect the brush you were originally using, then the brush will become active and the Layer Adjuster tool will vanish.

I am using a Mac with MacOS v10.13.6.