Wavy leaves from the fast growth. Theres a longer scientific reason but that would cause me to over think it as well. Seems very happy.. Humidity could be a little higher but otherwise doing great and you shouldn't be too concerned andnot needing to make changes. Once u have 5 nodes, 60% rh all the way through to 3rd week flower is great..even 65-70rh lights out After that 50,55,60 lights if all other needs are met.