8 days ago I asked this question about the fact that my surface character was able to do 3 quests in the Underdark. So, having received no answer I re-read the rules to see if the answer is in the rules and I'm just being an idiot. Instead, I found that either the rules have changed and the post not updated or there's a massive bug.
This wasn't the case. My surface tiefling was able to get xp and loot from the Underdark.Surface/Underdark Travel
Characters flagged as a surface race in the Underdark, and Underdark characters on the surface, will not gain any EXP from enemy kills or loot from chests in areas that are flagged on the side that isn't theirs.
So, now I have THREE questions:
1: Is a surface character allowed to have loot in the Underdark from chests or was that a bug?
2: Is a surface character allowed to have xp from kills in the Underdark or was that a bug?
3: Is a surface character allowed to do quests in the Underdark or was that a bug?