Messenger iOS 16 use different Apple ID not working
I have two Apple IDs. My spouse and I share an Apple ID that we consider our "main" Apple ID so that we have equal and seamless access to family photos, contacts, calendar, notes etc. For most situations this works well for our lifestyle, as we do everything together. For Messenger, however, I want to be logged in under the other Apple ID so people know which one of us they are messaging with.
In previous iOS iterations, this is easily set up, by going to Settings>Messages>Send & Receive, then tapping on the Apple ID at the bottom of the list, signing out of the current Apple ID, tap "Use your Apple ID for iMessage", and finally signing back in with a different Apple ID. This is how I have it set up on my iPad with iPados 15.
Since upgrading my iPhone to iOS 16, the last step listed above doesn't work...the sign in box greys out for a minute or so, then the phone signs itself back in to the "main" Apple ID that I just signed out of.
This only happens under the Messages settings screen. Elsewhere, I am able to sign in and out of either Apple ID with no problems.
Anyone else experiencing this?
iPhone 11