best response confirmed by Britt1972 (New Contributor)
Solution

@Britt1972 Hello, I'm trying to understand your scenario but find it quite difficult.. Are you saying you're using the tenant switch during the meetings? That will end the meeting and you'll get a notification about it too. Correct?

 

When you're organizing a meeting and need to jump around in different org./teams for whatever reason, try starting the meeting in the Teams desktop client and then use https://teams.microsoft.com on the side. The meeting stays active and you can switch between all the org./teams using the browser.

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