"Food has decayed" notification doesn't come up for sweeper-accessed food

I use the corner-access-by-sweeper infinite storage for cooking ingredients (anything that's used in a recipe) and despite getting the occasional "decayed" notification over some random wild grubfruit rotting on the map in dupe-accessible areas, I never get notified when stuff rots in the infinite storage. I find it weird that the food is properly counted in the colony summary in the upper left corner, the rotting is properly noted in the reports, but notification system ignores it.  Grumble grumble, where did my 10M calories in lettuce go?.. S**t, rollback again...

opening magma oxygen.sav