Ocean loading up weird.

I loaded up a new world on my server and I started to walk a little bit past the starting area and when I got out of the original chunks I had loaded when I spawned in The ocean began the generate in almost an incomplete way, as you can see in my screenshot. If I swim in the water, the generated water is perfectly fine, but if I go in the air spots I get sucked in, can't move, and eventually drown.