Just today I logged in to do my gardening and now as of today there is a huge delay and like four or five bells whereas its always been a semi quick process to harvest so whatever you all did please stop fixing things that work just fine as they are.
On that note, you have a plow all, a plant all, and so why is there no harvest all?
I suspect there is no harvest all because of the backpack limit. If you have 10 available backpack spaces and harvest all that yields 20 seeds, you would lose 10.