Is this fixed for you? I just encountered the same bug. My character has unlocked some Tek engrams, but I am unable to craft them at the moment.
The Engram Icon is disabled, I don't even have a crating tab. Switching folder view does not change anything. Also the Replicator seems to be capped at 235/600 item slots, I could not add any element to it at that point.
I removed one stack of Crystal and could add an element, powered it up to check if that changes the engrams - it does not.
I removed half of the materials in it to about 130/600 but still no engrams. Is there anyt