Messages in wrong order
I had Whisperfish closed for a while (because of the CPU usage bug), started it up after a while, and in this case the #whisperfish group had plenty new messages. Whisperfish shows them in wrong order, see screenshot. Most likely this affects p2p sessions, too, because this affects messages of a single user within a group - not tagging as group related.
This could be tricky to reproduce, but the data on my phone can act as a guinea pig
Hint / guess: When getting messages from database, order by ID is different than order by timestamp?