The about menu for MacOS Microsoft Teams version 1.2.00.8866 violates Apple programming guidelines.
The about menu SHALL produce a dialog box, a consistent behavior for all MacOS apps.
Instead nothing happens for several seconds, and then a small line appears with version information. This information disappears by itself after a few seconds.
The user believes that nothing happens, there are no response to the menu action.
Paul Schwann commented
Even worse, the version number shown in that Microsoft Teams/About menu status line is different from what is shown under Help/Microsoft Teams Help/About:
Version 1.2 vs. Version 1.0