Heh, so every so often, I read an L5 or Pinephone review and they say "I had some weird problem with MMS and it never worked". Naturally, since none of my apps have any tracking with them, I have no idea what happened or what is wrong. Thus, I reach out to the author to file a bug or send me logs. If they respond, they go "sure, I will get around to it", but I have yet to have it happen.
I tell that story because I wonder if you ever reached out to Martjin or any of the developers. It may be the first time they have ever seen the crash. You may have found an interesting corner case that they can fix for you.