The Windows 11 Insider Preview Programme channels have parted ways this week, with the Dev Channel moving onto the next version of the OS. However, the two channels may be running different versions of Windows 11 now, but Microsoft managed to break both builds with a poorly implemented advert built right into the taskbar.
https://www.notebookcheck.net/Microsoft-issues-new-Insider-Preview-Builds-to-Dev-and-Beta-channels-but-breaks-Windows-11-with-a-Microsoft-Teams-advert.558388.0.html