Thanks!

Moreover, I always set selectedPerson to a default value at launch.

I'm running the app in the debugger so the app is not being terminated. Once it is in the background, selectedPerson is set to nil but the call stack doesn't reveal anything unfortunately. I manage to "fix" this behaviour by saving the value when didEnterBackgroundNotification is triggered and setting it back when willEnterForegroundNotification is. This is more of a hack than an actual solution but it was just to demonstrate the issue.

This will also work: let _ = assignment?.description

Thank you!!! This fixed a similar issue for me!

Moreover, I filed a radar days after the first Monterey beta was released during WWDC. We're constantly told "file your bugs early" by Apple but I guess this isn't enough.

I was told that this should be fixed when Monterey shipped at the latest. Now, many apps will stop working when people start to upgrade to Monterey. Since this is a serious regression, I wonder why this bug hasn't been fixed yet.