When using Precise/Quick Deposit, the items dumped into the inventory prioritize dropping in the first available slot, which can leave the chest full of incomplete stacks of items depending on how everything is organized.
It would be a huge time and sanity saver if the deposit attempted to complete existing stacks first, and then start placing items in the first available slot.
gr8pefish
commented
6 years ago 
When using Precise/Quick Deposit, the items dumped into the inventory prioritize dropping in the first available slot, which can leave the chest full of incomplete stacks of items depending on how everything is organized.
It would be a huge time and sanity saver if the deposit attempted to complete existing stacks first, and then start placing items in the first available slot.