Group messages partially delivered on poor network conditions

[Norbert80]

Hi @moxie0,

on poor network conditions I often see that Signal indicates a failed delivery while some group members have received the message. Signal does not indicate which group member have received the message and which not. Re-sending leads to some group members receiving the message with multiple copies.

In order to avoid such issues it should be possible to implement a solution based on the following principle:

• Indicate the server that a message to x group members is prepared to be sent
• Transfer all encrypted messages (for each participant) to the server
• The server waits until messages for each participant have been received
• The server delivers the messages

Found with Signal 3.9.1.

[agrajaghh]

@Norbert80 have a look at the (afaik planed) optimizations mentioned in https://whispersystems.org/blog/private-groups/

I think the UX problems you mentioned are a duplicate of another issue, but I couldn't find it at the moment...

[ghost]

I often have problems like that too -- due to poor signal (lowercase s 😄 )

[2-4601]

#2639
closing as dupe