iPhone Keeps Renaming Itself to iOS_ASSIGNED-(Serial number here) since 16.3.1 Update

Hi,

Since I took the 16.3.1 update, my iPhone keeps renaming itself to iOS_ASSIGNED-(insert serial number here). I have been changing it back to it's old name plus an incremental number each time I change it, but it keeps going back to the iOS_ASSIGNED name. I can't find a pattern of when it is changing itself (like connected to my car, or a specific wifi, etc.) Anyone else with this issue?

Thanks!