"Corrupt" Status Effects don't work as expected on mobs

"Corrupt" Status Effects (Status Effects with levels over 127) don't work on mobs like they should. They work on players, just not mobs. For example: Levitation 128 instantly sends me to the ground. However, for mobs, it sends them straight up. AFAIK this works with /effect, I haven't tested it with potion effects.

Steps to reproduce:

/summon Creeper
/effect @e[type=Creeper] levitation 1 128