Have to click twice
I've noticed lately that when I launch Mail or iTunes and other apps by clicking on the icon in the dock that the application window doesn't open. I have to click again and then the window opens. Not a big deal, but does anyone know the reason this would happen and how to fix it. It happens on all three of my apple systems - two iMacs and a MacBook Pro.
MacBook Pro 13", macOS 10.15