So here are 2 issues, kind of related.

Lets say you have 5 pickaxes of the same time, if you extract them using the accessors, they come out in a stack, when you put them back in the chest (manually) they stay stacked, handy for saving space but should not happen. Same with buckets, water buckets, lava buckets, etc.

Now lets say you have 2 pickaxes at 1 durability each (about to be broken), they come out in a stack, when you use them, the one being used breaks, but the other one stays with full health now!.

I think that removing the staking item should fix this (main rule should be, if the items cannot be normally stacked, don't display it as a stacked item in the accessor), happens for all 3 of them.