TL;DR
Allow labs to share spoilage amongst themselves like science packs.What?
Labs should be allowed to share spoilage just like science packs in order to prevent the agricultural packs spoilage from jamming the labs in compact designs.When not researching agricultural science, the Gleba packs spoil inside the labs, eventually occupying the slot and halting research completely.
The only solution right now to this problem is to either limit the input of agricultural packs while a Gleba research is not active (there would still be packs inside the labs from the previous research) or have a spoilage output on every single lab.