I am getting occationally "hangups" for for certain crafts in current version of Monster(for example the crafting of ME basic processors). But this is only occasionally and can usually be fixed by just re-queuing the craft. (have a suspicion that this problem is caused when several steps of the craft requires the same item and one step then "steals" the item just crafted by another step).Isn't that a known bug with the latest version of AE? I usually use the workaround of picking up and then putting back a pattern in the MAC.
The problem that the OP explains sounds a lot more like it stalls due to the bugged MV-transformer recipe.