@crinrict This is already known at this point, but I had Batuu items in my inventory. So, Kyber crystals and hilts.
I did find that if I emptied my inventory before getting a stack as a reward, and if I played with the inventory open for a while, the crash was sometimes avoided. However, it's very inconsistent. I happened to have two saves at the same time, and if I crashed one and reloaded it, it crashed again. But if I loaded the other save, i.e. went back and forth after each crash, I could avoid a crash using the above method.
I would then empty my inventory when I was no longer in a crash recovery cycle. But that was just too much work, so I stopped playing Batuu once I had the save stable.
It does seem to suggest a problem with information remaining with a save after a crash, which is cleared after a subsequent save. And is under the same umbrella as I mentioned earlier about saving information that shouldn't be being saved. If that's the case, then there's a potentially major save corruption issue.