[qxxx]

yeah... I have the same problem. I click on the icon in dock and nothing happens. For example, Microsoft Teams.. I need this to open it and contact someone asap, but nothing happens. I need to search for the teams window on all the desktops. Or right click it and select the window, usually this works. But still frustrating. I have been using Mac for 6 months (before Windows and Linux) and Mac OS is sometimes frustrating when trying to do the most simple stuff like bringing a closed app back to front.

[floydnoel]

That is a bug with Teams. It apparently doesn't know how to show its own window. Sometimes if you keep clicking the icon you can get the window to show.