levitation works diffrent on mobs than it does on players

When I applied the new levitation effect with a strength of 128 or more on a Zombie It raised up

I expected the effect to work the same way for mobs as it does for players. Levitation with the strength of 255 makes you float for ever
Instead the effect raises mobs up. I don't think this was intended, because the new floating is a good feature for commandblock comtraptions

Steps to Reproduce:
1. /summon Zombie ~ ~1 ~
2. /effect @e minecraft:levitation 10 254 (128 - 255)
3. jump to see the diffrence

youtube link: https://www.youtube.com/watch?v=fq8oudZlxXc