Lissandra and Zed ult interaction (bug)

Yesterday i played Lissandra against a zed. He ulted me and i ulted myself and he was teleported in the air but could still attack me while he was invisible for me. Zed sayed he wasn't invisible so it was only for me like this. sorry for my bad english and have a great day ^^ edit: i also went to the match history and looked at the moment this happned and everthing was normal: https://youtu.be/SU2qcVwEXe4