Is the Xp on rush levels working?

When I rush a level it says I get 5000 monster Xp. Yet I am training new monsters and they never go up a level. It seems as if the monsters on my team do not get the Xp. Has anyone else noticed this?

Yeah, they automatically added to your mobs

You don't get to see the level up animation that shows how much each stat has increased via level rush, but yes the monster EXP is in fact added to your team.

Do note that if you've equipped any of them with EXP boosting items like Dumbbell, they will have no effect in level rush.