Why do I keep getting kicked out of a Team on Teams?

Hello smurdoch 

welcome to the Microsoft community, My name is Recep I'll be happy to help you today;

I understand that you keep getting kicked out of a teams channels meeting,
I will like you to confirm this same behavior on the web, if the web seems to be fine

I suggest to clear your Teams desktop app cache and you will definitely be fine.
1. Sign out on Teams > Quit Microsoft Teams by right clicking the icon and select Quit.
2. On your keyboard, Hold Windows key and Press R
3. Cut and paste %appdata%\Microsoft\Teams in the RUN then OK.
4. Delete the contents of the entire folder.
5. Restart Microsoft Teams > Sign In.