Issue with Pre 9

On iPhone 16e running April '25 (pre 9) Release 25.3.99-pre9 - Base Build 25.3.100

When I go to Settings then go to enter the operator callsign the screen briefly comes
up to enter (or change) your callsign, then disappears and then the app locks up.

If I switch out of the app and pack into it the callsign field is there and callsign can be entered or modified.

This error does not occur on my iPad.

Pre 11 is behaving the same way.