I had 4 beewax and 6 leather.
As usual, I use my cauldron to create hardened leather, but normally I create them one by one because bees are a little lazy and wax gets hard to get if you don't have lots of nests (but that's not the problem here).
So I have colected 4 wax and then I grab 6 leather to create 2 hardened leather.
I click on "craft all" and wait. And here comes the problem:
One hardened leather is generated but the next one turns as standard leather!
So I'm a little amazed and because I want to see what exactly it comes from, I try it another time (another day that is to say).
Once again I reunite 4 wax and 6 leather and this time I try to craft them one by one (not clicking on "craft all" but "craft").
And then again I have the same problem.
I'll try to see what happens next time when you remove the first made hardened leather.
Is this an usual occurrence with batched craft?