I run a Surfacebook 3, Windows 10, all up to date. I recently reset the laptop to factory settings and installed everything from scratch. Since then, the little window showing what my camera sees during a Teams call is not filling up all its allocated space. In the screenshot you can see a black area around it. When there is other content on the main screen, that area shows as transparent and has a white border around it.
I have checked the team settings and everything looks ok. The camera shows me correctly in the big preview of the Devices settings screen. But when I'm on a call, the cut off version appears.