One common thing I see between Messages and Mail is contact info.
You also mentioned that typing "sa" in the SEND box no longer works. That's also working from contact info, matching what you type with fields in the contact data.
I'm not sure if Airdrop uses contact info, because I never use it, but I wouldn't be surprised if it did.
You also mentioned that typing "sa" in the SEND box no longer works. That's also working from contact info, matching what you type with fields in the contact data.
I'm not sure if Airdrop uses contact info, because I never use it, but I wouldn't be surprised if it did.