I put 5 stacks of 5 Exotic Flesh into my Large Campfire, and before I even turned my campfire on, all 5 stacks had lost 3-6 Exotic Flesh in each stack and my spoiled meat was increasing rapidly right before my eyes. This stopped as soon as I turned on the Large Campfire.
I had just taken the stacks out of a preservation box.
Ok, so officiel server.
You should be able to see the settings, on what the spoiltime is set.
If set as usual, so it may be bug.
Just tested stuff on singleplayer, and there i didn’t mention change. But i play also on server, but not today. So no clue.