After the hallowed nights event began, previously full freshness pumpkins that were bundle wrapped were now set to 50% freshness. Likely has something to do with how hallowed nights effects the max freshness of pumpkins or something.
After testing, this only seems to affect pumpkins bundled before hallowed nights started. I can't reproduce the bug by creating a world with events disabled and then enabling hallowed nights later so it may be some other change from this update affecting it?
Log in to your long term world and notice all your pumpkins have spoiled.
Be sad that you have over 800 bundled pumpkins...