iMessages that claim to have been 'delivered' then fail after going into airplane mode ~30 seconds later.
- Send iMessage.
- 'Delivered' tag appears on the blue message almost immediately.
- Put phone into airplane mode ~30 seconds later.
- A few minutes later, the message shows up as a green text message instead, with a 'failed to send' error. Hitting 'try again' sends the message as a text.
Expected behavior: Step 4 above does not occur.
I don't understand how my phone's connection still needs to be active after that point of initial "delivery".
What does 'delivered' actually mean, if not that the message was delivered to the recipient successfully?