The brush settings change unintended when switching to move tool
create new doc
create pixel layer
select brush tool, select brush with sharp structure (Engraving - Smooth Rake)
switch from brush tool to move tool,
switch back to brush tool
the hardness value changes from 100 to 80, but the value shown in UI is still 100.
To correct you need to open hardness value and enter again.
FullSizeRender.mov