P: Brush in intersect mode does not show the cursor

Mac OS Sequoia 15.5 / Lightroom desktop 8.4.

If:

1. I create a mask (e.g., Select Color) then
2. choose intersect with Brush,
   
   the brush doesn't show until the mouse button is pushed and the size cannot be controled using the sq bracket keys although the slider works. Once the brush shows, it doesn't disappear until another item is selected. This problem does not exist in Classic or Photo Raw.

This wasn't an issue prior to the update yesterday.