Additional team and channel-related features and issues within Microsoft Teams for Education
...and it gets worse...
This morning, links are opening in Edge even though my default browser is Chrome. In settings, under "Files and Links," you can choose between Edge and Default Browser, but there is no way to save your choice, so Teams continues to open links in Edge. It's behavior like this that supports arguments in anti-trust cases. I'll be uninstalling Edge now, thank you.