There's another strange issue I have run into with StartAllBack. With many programs that have a menu bar below the titlebar, if you click an empty portion of that menu the titlebar stops reacting until focus is manually changed somewhere else, like you click on an actual menu item or click somewhere outside the program window. Happens for example in Notepad++, Everything (from Voidtools), partially in Sysinternals Process Explorer. Process Explorer is special, it still shows the hover effects, though with a lag, but the buttons don't react.