I ran the new gamemode once got a dante main bp drop and it gave it to me i ran another run and got systems and chassis but when the mission ended the blueprints were gone.
Edit: it seems like starting the mission from orbiter instead of the sanctum anatomica doesnt cause this glitch. I just reran from orbiter and the neuroptics blueprint dropped and actaully stayed in my inventory. The time i got the dante main bp i also started from orbiter.