Two related things:

When coloring in a single piece, the palette selector keeps defaulting back to the top one rather than staying on the most recent one used. Since I’m “of a certain age”, I can’t always remember which was the last one I used, so it’s a pain.

Also, when opening and closing different pieces, the brush/size/opacity seems to stay one the last one used in general, not the last one used on a specific piece. It’s almost impossible to get back to the same size and opacity you left off using.