Teams Live Events - Include system audio automatically turned off when switching screens
In Teams Live Events, when one of the presenters shares content that includes audio, they will turn on the option include system/computer audio. I have experienced at multiple occasions that this option automatically turned off (which was not intended) and this appears to have been caused by switching active applications (e.g. move from powerpoint to a webbrowser showing Menti.com and then switching back to the powerpoint) via the ALT+TAB key combination.
Just to be complete the person did NOT stop sharing and re-share, the person shared it's desktop and switched applications via ALT+TAB that seems to have caused this option to turn itself off.