Hello! If this is the battle not resolving after you summon the extra boss, that is fixed in v1.30.9. Upgrading will keep your run, but you will need to redo the fight.
If it's not that, you can reach me at: at.mojibake@gmail.com
if you've still got your runprofile.sav that would be amazing (but it has been 2 days 🙏)