Takes already used pickaxes from Shulker

[graemeg]

I'm digging a highway to the world border, but only have 3 shulkers of pickaxes, so I can't use the pickaxes until they pop. So I enabled ItemSaver and set it to 2% durability remaining.

What happens: So if my shulker's first 3 pickaxes are already used to 2% (30 durability) in the top row of the shulker, and I only have 1 pickaxe in my inventory. When I start digging with HT, it will place down the shulker, take out another pickaxe - the first pickaxe (top row, first one on the left, that only has 30 durability).

Expected behaviour: It would make more sense if HT took the ItemSaver value in consideration, and found the first pickaxe in the shulker that has more than 30 durability (2% remaining - as per my ItemSaver setting), and put that in my inventory instead.