In 1.12.2 recipes could be created in the pattern Interface successfully, but craft cannot start when clicking "Next Step",with no responding in the UI, which is used to select the quantity of the item.

I need to close the crafting terminal, and manually start the craft, which could be started correctely this time.

I used the Unofficial Edition of AE2, and this happened. But it could occationally happen when I use the normal edition of AE2(not as frequentlly as in the Unofficial Extended Life Edition.)

I hope this could be fixed because I think it is a really fantastic thing, I an glad to see it work in the Unofficial Edition.