OK, I'm encountering a really weird bug in the early game.
The optional side quest for Gunari where you have to retrieve his stolen weapon crates just won't complete for me. But its kind of weirder than that. I'll do the whole mission non-hostile, making the deal with their leader and then the game leads you to the subway to exit the level and return to your Keiz. Except once the game has loaded the area it has reset the whole mission and directs me back Gesundbrunnen to do the quest from scratch.
I've loaded the game over and done the mission again and it does it every time. It's like loading back into the hub resets all the mission progress.
EDIT: Just tried it the hostile way and located the shipment that way. I'm now supposed to head back to the hub and give the info to Gunari, I go back to the hub and... it's directing me back to do the mission again and Gunari has no dialogue related to it. I guess the quest is bugged then.
Update on this issue in case anyone else encounters it:
I did the next couple of story missions, and after meeting Frau Muller I attempted it again. This time the mission successfully completed and was cleared off my mission log. Hooray!
However, it happened again in a different mission. The next thing I did was the Pharma mission where you have to go in to clean up 'loose ends'. I finish the mission, return on the U-Bahn, and on the way back I get the dialogue with Amsen that a lady called Frau Muller wants to meet up. I'm like "what? I just did that?", and sure enough, the game is repeating that mission plus the whole subway power down setpiece.
It's incredibly weird. I've literally never had a game just completely fail to track multiple quest completions, making me repeat whole quests that I've already done.
EDIT: Annnnnnd the fucking Pharma mission has reset. Wonderful.
I think I'm done. I can't with this. This is straight up broken.