Content isn't immediately visible ONLY until you scroll down

Content isn't immediately visible on my WORK and PLAY tab pages, only until you scroll down does it appear and move up where it is supposed to be. It seems to be a mistake with the animation because there is no previous block or section. It is just the header then the media grid gallery. I cannot find a fix. Could someone please help? It makes my website look as if it is unfinished and like there is no content just a plain blank page. 

website: www.macelch.com

Thank you in advance!

If you have all animations disabled, then you should reach out to support.