I was doing a T6 Farming the goblin tower to farm pieces on my CB, I took my friend along with me but every time he levels up to 6 at the end of the dungeon, 3 times in a row returned to level one. This also caused my character to have a false wipe and make me have to hard quit and load back in which also is terrible because the real bosses are the loading screens. Especially having to load the main menu which is a pain.