Fizz ultimate damage undodgeable by spells

I noticed a bug that has been around for quite a while. From what I'm seeing, 's ultimate "chum the waters" cannot be dodged by dodge abilities such as 's pool, 's Ultimate, 's rappel and so on. Since these abilities can dodge all other spells, it makes no sense why 's ultimate cannot be dodged and thus I'm assuming there is a bug with his ult. Riot please fix this has been around for quite a while and it's pretty annoying.