How were Crafting missions broken?
(I actually talking about the schematics, they weren't broken before other than not showing properly whether you knew them or not, now it's much worse because they all appear to be unknown and they don't tell you know them until it's too late)
They were because, in 1.2 patch they allowed (theoretically) to send 2 companions to the same mission (if you have 2 copies of it), but if you click into 2 identical mission discoveries before completing the first one, the second is simply lost, in the same way you loose an already known schematic.
That 1.2 patch note only claimed to have resolved that issue, but it never worked as intended.
It is a well-know confirmed and investigated (but not resolved) bug!