iMessage Bug?

[Dantheman84]

Hello everyone!

I have an iPhone X running iOS 12.3 and an iPad Pro (Cellular) running iOS 12.3 too.

I haven't been signed into iMessage on my iPad for around 3 months now, it's running on my iPhone fine.

I got home from work yesterday and noticed that I had an SMS message from my carrier on my iPad, when I tried to read it, it took me to the messages app and asked for my login credentials. I noticed that the messages that were displaying in the background (behind the login pop up) were listing iMessages from the previous day, up until around 11pm? I signed in, cleared my SMS from my carrier and noticed that my iPad had stored all of my iMessage history?

I have two factor authentication setup and I (or my wife) haven't signed in on iMessage, I just don't understand how messages seemed to update in the background despite not been signed into iMessage?

I logged back out the messages folder and this doesn't seem to update now, I just have the login pop up with the last stored messages from yesterday (which is how I always thought it should be?).

Is there something I'm missing or has anyone else experienced this before? Thanks for any help or advice, I've tried to google it but I'm no further on.

 

[ApfelKuchen]

Maybe it's because you received that SMS message from your carrier via your iPad's cellular connection, not iMessage.

Next... Do you have iCloud Messages enabled on both iPhone and iPad (Settings > [name] > iCloud > Messages? If so, your iMessage activity is being synced to the cloud, little different than iCloud Contacts, Calendars, Notes, etc. The moment you signed into iMessage on the iPad, the iPad would begin to sync your iMessage history from the cloud.

Finally, even if you don't use iCloud Messages, a bit of your iMessage activity is still buffered on Apple's servers, so after a sign-in you may see some, although not all, of what you have on your iPhone.