Nope, they were fine previously, then sometime between then and now they became rotten.
I do update to latest frequently and have carried this save over for IRL years now, so who knows? It could be due to changes since I made the jar, or due to some spurious bug that was in the code briefly at some point since the last time I went over my larder.
If nobody else has had this happen it’s probably not a big deal. I’m just curious if it’s happened to anyone else.