The latest update broke one part of resizing brush via Alt+right-click (hover). The size of the dual brush. It makes the dual brush size smaller than it should be when sizing down the brush, and larger than it should be when sizing up the brush.
Test it against the shortcuts [ and ] and you will see what I mean.
rolling back to 21.2.0 fixed it for me, but if you do it make sure you do backup of all settings/brushes/..., or you lose them (like i just did, thank you Photoshop for the no warning about that)
Thanks for reporting this issue and we are working on it. In the meanwhile, you can resize brushes via UI sliders or use the bracket shortcut keys to resize.