When I attempt to join any official or community server, DayZ sometimes appears to load but returns me to the server browser. The background becomes blurry, and only the Up and Down buttons on the D-pad work. A, B, the bumpers, and other controller buttons stop responding inside DayZ, although the Xbox itself continues to work normally and I can launch other games. Audio continues playing.
This happens with every Xbox account on my console, but my account works normally on another Xbox. I have tested three controllers, factory-reset my console, reinstalled DayZ multiple times, cleared the alternate MAC address, and confirmed that my console and game are updated. DayZ is installed on the internal SSD, and other online games work normally.
Please investigate a possible Xbox Series X-specific DayZ menu or server-joining bug.