A weird thing has been happening to my gf and me. Over this weekend, we leveled about quite a bit, she 40-47 and me 36-46. We leveled exclusively by two manning nearly all dungeons. For the first few runs, our experience gain was awesome(about 1 level per full dungeon) but then we noticed our experience gain dropped to almost nothing after a while. We first noticed this on Sunday, we did 5 dungeons and I got 5, and she 3-4 levels. After that, exp gain was almost nothing. We'd do a whole dungeon and get around 3-5% of a level. But, we didn't pay attention to it, went to bed and played again Sunday. Same story, got 3-4 levels with exp gain of 1 level per full dungeon, and then it drops to almost nothing per dungeon. After she went to bed, and a few hours after we last did a dungeon, I soloed Fungal Grotto on lvl 44, and got from 44 and 30% to 45 and 20%. After that, I stopped getting exp almost completely, I did half of Direfrost Keep lvl 45 and got around 2% of a level. Today, we did 1 dungeon run again, and same thing. We both got nearly full level from it, and then went on to do Blessed Crucible, our level. We got about 3% from around 80% of the dungeon.
It seems like there's some sort of a limit on experience, after you get a certain amount of exp in a certain period, your exp gain drops to something around 1/10th of what you normally get. I checked online a bit and can't find a mention of this mechanic anywhere.
Is anyone familiar with this and can shed some light on how it works, like what are the time periods and how much exp you can get before the limits turn on?