Comparator Signal Strength Does Not Always Update for Crafters

A comparator reading from a crafter can output the wrong signal strength if the crafter is powered quickly, such as with an observer clock

Steps to reproduce:

1. place a comparator with redstone dust reading the crafter

2. set up an observer clock to power the crafter

3. block 8 slots in the crafter

4. have some items for a 1x1 recipe fed into the crafter

5. when the items run out, the comparator will still output a signal strength of 9 when it should be outputting 8