I've thrown together a new 24.12.1-stable branch: https://sourceforge.net/p/rosegarden/git/ci/24.12.1-stable/tree/
I've fixed the invalidated iterator bug. Please grab a snapshot from there and put it through its paces. It's the best we can do for now. Until it goes through the Debian process and we get a new binary, we won't really know for sure.
I'll see if I can find additional reviewers and testers upstream. Let me know how it goes and I'll do a 24.12.1 release.
