Hello,
Media status is bugged in Nest mini (1st and 2nd generation) and Google Home (1st generation). It works normally on Nest hub.
The 'finished' event is just not triggering after another media has ended. The bug started about week ago.
I tried on new and old projects where it was working before and it seems like it is bugged everywhere.
I have also tried on different accounts, different networks, and even on clean project (with nothing but single intent and media status handling to loop some audioclips).