I lack screenshots of the end-of-mission rewards as I didn't expect the rare bounty reward to just vanish obviously. I ran the mirror defense with the objective destroy 60 decorations iirc, solo. Upon choosing to extract there was an odd, but not too unusual, several second delay between me seeing what I had picked-up during the mission and the bounty reward being added to the list of items, a Mandonel blueprint. I knew I lacked the resources and parts to actually craft it, so I went about continuing random bounties as I had been. Several hours later, I went to my foundry after getting the last of the Argon I needed for Qorvex's components, only to realize the Mandonel wasn't there. I've been unable to find other reports of the blueprint going missing, and have been unable to get a second one to drop to confirm if it's a recurring bug. I never was given the "network not responding" symbol during the extraction, and ran the mission in solo. I don't know what would've caused it. As far as I can tell, I received everything else from the mission, but since they were just misc resources I can't do a certain count to make sure. I had hoped a msg would appear in my inbox from Ordis saying "Oh, you dropped this Operator." with the missing BP by now. Alas, it has not. So a bug report it is then.
Here is a screenshot of my inventory just to show it's missing, for what it's worth