Until last week we have been able to show Vimeo live streamed events ("upcoming" thumbnail and during the live event, same as showed on Vimeo's page) on our web site. Our page only displays the code {vimeo}vimeo.com/###{/vimeo} until the video has been archived (### is the video number).

Joomla version is 3.9.20 and issue has coincided (I think) with joomla version upgrade. AllVideos version is 6.1.0.

Yes, I was seeing the plugin tags on the live page. I am adding the tags each week in the joomla article editor. Oddly enough now it's working on my next page prep (I prepare a test page that is unpublished, then copied and pasted into the live page instead of editing our live page) with no action on my part.