weird water flashing with water sound and land swimming.

[Thornagar]

So I am getting a weird bug where when I move my character thinks they are in water for split seconds and I get under water textures. this happens in super fast repetition like if I had low frames(Not sure if frames have anything to do with it). actual water also flashes for a moment. Anyone know why this happens?

[Sgt. Marge]

I've seen this issue reported before, and the fix tends to be locking the frame rate to 59 or 60 fps and enable V-sync if using a 60hz monitor. 

[donttouchmethere]

Are you using an ENB? I would check the ENB settings in addition what Marg597 said.