[2023] Mission completed and then DELTA-03 error

So last night, we've completed Legendary District Union.
For my part, I've received the XP reward, Exotic cache reward and some other rewards for completing the mission.
But then shortly after (I would say 45 secs after) got the Delta-03 error message.

I've logged back in only to find out that the missions is marked as not completed and my exotic cache was removed from my inventory.

Anyone experienced that before ?