When player knows ship / weapon / fighter blueprint and obtain another one they are met with this screen
Spoiler
(https://i.imgur.com/UFRYvMa.png)
At the same time, if player obtains blueprint for an industry for second time this is shown.
Spoiler
(https://i.imgur.com/POGbLiN.png)
Trying to learn it shows "blueprint already known" message on the top of the screen and blueprint doesn't glow as well.
Admittedly, this doesn't happen in vanilla at all, but that's disparity between industry and other blueprints, which doesn't make sense.