I got this quest and proceeded to the River Rhine. However, right off the bat I noticed that whenever I enter the river, the quest disappears from my log entirely. The entire River Raids category vanishes and the quest does not appear in the upper left corner of the screen when I'm exploring. This occurs regardless of whether or not the quest is tracked before entering the river, and I obviously can't select the quest after I've entered because, like I said, it disappears from my log.
After entering the river, I went to the location of the champion and found the note saying that they'll only appear when I kill the two captains. I left the river and then returned. According to a guide, the captains should spawn in two of the four military locations along the river and I have to confirm their deaths. They do not. I've fully cleared the river three times and not a single enemy in any of the four military raid locations can be confirmed.
I have a feeling that I've encountered a bug and the fact that the quest disappears from my log whenever I enter the river means it can't update.
How do I fix this? Am I just screwed?
And before you ask: I am not reinstalling the game; yes, all of my drivers are updated; no, I am not using any trainers or mods