Recently I was attacking someone and I was at low health and down to needing a few XP to level. I had 8 XP to the next level so I did TWO 3 XP demi-quests that give you energy potions, so I needed 2 XP to level, so I waited form health to get to 10 and attacked this guy and BAM I'm back up to needing 8 XP, which was weird and I thought I could have misread it or something again. I basically repeated the process to or 3 more times and finally had 3 XP needed and attacked the same guy and was finally able to level.
Anyone else run into this bug?