When I have multiple instances of the same program running I see white dots to the left of the launcher icon indicating how many instances I have running. When I click on the icon I see the window switcher kick in and all of the instances appear zoomed out.
I used to be able to mouse over the instances and the window's title would appear which helped to distinguish between the instances. However, at some stage over the last couple of weeks this has disappeared.
Is there a way I can re-activate the display of the window's title on mouse over?