Contact key exchange failure prevents connection on 2nd attempt

[ecurrencyhodler]

What's happening now

Today Ali tried to add me on sphinx chat by adding my pubkey to sphinx chat. It failed. He sent me his pubkey and when I tried to add him, a chat section opened but I couldn't DM him. I also was unable to send him a DM or grab his profile information such as a name. What was displayed was the "a" which I had typed into the name when adding his contact key.

When I dm'd him, the message just disappeared and chat window remained empty.

When I troubleshooted with kevin, he asked ali to delete me from his sphinx chat. When I tried to add ali again, it worked.

Therefore there is a bug where if a contact key exchange fails initially, it remains stored in the person's sphinx chat. And when that person tries to initiate a contact key exchange, it fails or doesn't occur because the app assumes the person has been added (we think).

Expected behavior

A contact key exchange should occur even if the contact is stored in the sphinx app if initiated again by the other person.