I seem to be having more trouble 'docking' palettes, or dragging them into a group on the sidebar on the right. Wondering if anyone else is experiencing this resistance?

When I drag a floating palette onto a closed group, it highlights blue, but I think it used to disappear and you could decide where in the group you wanted to put it, or even into another group or by itself. Currently, there is a light highlight on the group, but when released, it remains floating. When dragged to an open area, the floating palette dims, and will dock by itself.