I don’t know if this is still relevant, but just today I got the schematic, learned it, crafted the Mark II, stashed it on a legacy hold, used it on another toon, then went back to my crafter to see if I still had it, and I did and was still crafting. Just for good (maybe excessive) measure, I cancelled the crafting queue, logged out, logged back in, and tried again, and it all worked out. So I guess this confirms it’s been fixed and is still working.