It could just be the angles but the fan leaves look slightly droopy... it looks good though, you get lots of air flow? In my experience something like that could be a bunch of stuff like too much/too little light or low air exchange or even a watering thing maybe lol
Could you give us any other info like temp, is it in a closet? air coming in and out? how often do you water?
It's not looking real obvious to me but it's quite possible there's nothing wrong with it at all, id def not be worried at all though if something is wrong u prob got lots of time cause it looks real green and healthy.