Crafting locks up on first item of a 20 item craft

1) Crafting locks up on first item of a 20 item craft
2) very intermittent I have had it lock up 3 times out of hundreds of crafting attempts.
3) no (though you have to log out to be useful again)
4) When crafting Bear or wolf hats, I have had it lockup on the first item of a 20 item craft. It stops with the crafting bar labeled success. In 2 of the 3 cases I noted that the bone needles were brand new, not sure of the other case, did not pay attention to it. Closing the crafting window with the x leaves the table engaged and crafting animation continues. At this point to free it up, I need to exit the game and come back in.
5) Very inconsistent
6) happened on 2 different computers with different specs.

 

I just had the same bug smelting making bronze ingots, I was making 12 of them this time so the number may not be important. I was using a ingot mold at 100/100 and it was also the first try after returning to the smelting station, not sure if that is important either but I will note when making the hats it behaved did occur on the first use of the crafting station after going there.