Yes, I agree. I think he was stressed. It looks as though he is trying to sneak out. His nose and lip are bruised. That is generally caused by them trying to push up out of the tank.

Do you have a photo of his tank so we can see if there's anything that we could recommend?

Get some plain, original Neosporin in case he scratches open his nose. Original only, none with pain relievers - the pain reliever type is toxic to them. Pick up some soft ended Qtips too.

The humidity of 80% with mid day drops to 50% is okay for Whites tree frogs. Just mist again at bedtime . Be sure he has a nice water dish of fresh dechlorinated water each day for hydrating.