Smack 4.3.1
Prosody 0.11.1
Android Pie (9)
How does one handle lost receipt, where the receiver received the message but the sender failed to get the receipt? This is mentioned here: XEP-0184: Message Receipts but there’s no solution.
Sender >>>Message delivered>>> Receiver
Sender !!!! <<<Receipt lost<<< Receiver
Effectively, the receiver sees the message but the sender sees it as undelivered.