Thanks!

Nope, not that, as it does change eventually when reminded to just open signal for example.

True, but i can see only one checkmark so the message is not delivered yet, while other apps can.

I can literally see that massage is not even delivered. If I see the delivery mark, then yes, the notification always appears. Then frim that point is person fault, but not when the message seem to not even reach the other. (Mind the phone is online and other apps deliver)

I think it might have solved it for me as well, but its not guaranteed for every phone in my experience. But it’s still annoying, that this is something that I then need to explain to others to do the same. The added friction just turns avg person away quickly.