Axolotl on PinePhone / Mobian

[kqlnut]

I'm not sure whether I should have openend a new thread for this topic as not to overload the Axolotl thread...

Anyway, I have the following Axolotl problem:

All of a sudden I can neither receive messages from one friend of mine nor can I send messages to her – they are marked with this triangular, red traffic sign (instead of the two circles) and never go out. Everything else works, only this particular person is affected.

I tried "reset encryption" for that chat, afterwards deleted the chat and asked her to do the same on her (Android) phone – it did not help, the problem persists.

However, I can still communicate with her via the Signal desktop app on Linux Mint. The messages I send via the desktop app not only go out, they also show up in Axolotl on my phone. Her messages on the other hand only reach my desktop app, not the Pinephone.

My friend's contact looks exactly the same as all other contacts in /.config/textsecure.nanuc/registeredContacts.yml -- nothing remarkable and no zeroes at the beginning or end of the UUID. 

I had the same problem with somebody else a few weeks ago. Back then I could "solve" the problem with a complete reinstallation -- something I'd like to avoid this time. (I would not mind the reinstallation part, but connecting Axolotl to the desktop application again and reentering all the contacts is quite annoying -- especially if a likely perspective is having to do that over and over again...)

Is there any solution apart from reinstalling Axolotl?

You would probably be best off reporting your problems in the project's bug tracker on Github. You could reinstall the app while keeping the $HOME/.config/textsecure.nanuc directory, that way you keep all your configuration and you wouldn't have to reenter anything. But of course it's also possible that something is botched in your configuration. In that case you could also backup the configuration directory, delete the original and reinstall the app, add just the one problematic contact and see if it works. You can always copy back your backed up configuration directory to have it back in the old state.

Edit: Sorry, didn't see arno's post before. Ignore my advice on reinstalling then.