Nice, I'll give it a whirl. Their their website says, "ArcaneChat is a Delta Chat client" so maybe it deals with the issues I've had better.
bug reporting
I'm looking for projects I can contribute to in some way, so definitely not averse to bug reporting. From some discussions on the forum, the way I'm using it isn't really supported and they're really aimed at people who want to chat securely without being tied to proprietary networks. But I'm certainly not the only one who would prefer not to use proprietary chat protocols like WhatsApp, but there's just too many other people I'd have to convince to switch to yet another chat app. Delta Chat / ArcaneChat really seem to offer a way forward for people like me, but the chat experience for people using regular email clients has to be very good - people get annoyed quickly if they receive 5 emails in a row each containing a single picture followed by a 6th email that just contains text (which is how my attempt at a message sharing some photos came through for email users)