my exp bar is stuck

[Hysterior]

You will experience this near the end of each expansion. All the post-ARR stuff is designed for level 50 characters, so at level 54 your exp gains are significantly diminished. You should start earning exp normally again once you're into the next expansion.

Oh great... I created a new character on a world in need to test the new quests. I have just done Brayflox (normal, the lev 32 dungeon) and my character is already level 52 with some 170 gear...
They throw so much XP at you it is ridiculous