Have you all tried removing your /data/ folder (if it's there)?
This would only be valid if any of the mods I used were any way related to balloons, inventory, durability, colour, or any other .xml related things. Given, I don't even use a data folder, but I use my own .pack mods I make myself that are usually visual or sounds, I doubt it's related.
But to answer, yes, I have removed my folder with my .pack files in it, and I still have the same issue. I've also done this months back while my boyfriend had this same issue while I didn't. I mentioned before that we both have the same .packs and both run Abyss, and I would troubleshoot on his laptop all the time since his Pleione engine loads up faster than mine, it's much easier to run tests on his laptop. However, now that it's reversed and the crash issue happens to me, I too went through the same process, and the .pack files don't have anything to do with it.
TL;DR
This would only be relavent if anything in our data folder or .packs was any way related to the balloons or had outdated .xml files.