Vlad taking damage while pooled

When in a game as Vlad yesterday, multiple times I was damaged by a Fizz's shark while I was clearly in my pool. And there was one time I think I was damaged and knocked up by a Yasuo whirlwind, but I'm unsure about that one because it was borderline near the end of the pool duration. Anyone else noticing similar things. As far as I knew, while pooled, you were onlt damaged by abilities ignite and other damage over times that were placed before the pool was cast.