Infused flute seems to ineffective against Ice and fire's hippocampus, despite they have a follow ai when certain item is held, it does work on animania's hedgehog and ferret with their weird following item.

also, it work on Ice and fire mod's snow villagers

Their path navigator is not PathNavigateGround. I think fixing this would be too complicated and not worth it.

maybe i can contact the i/f creator to add the infused flute as a following item for them.