Just a nuiance I discovered...
I had 127 stone, I crafted 64 block on the block bench
Now 63 stone is remaining in inventory but the multiplier is still set to the max value of 64 so I cannot craft anymore. I have to reduce multiplier by 1 in order to craft the remaining 63
The multiplier ( if 1 < inventory < current multiplier ) should reduce to whatever is left in inventory