Friends and I were heading to the Prison Island and I wanted to start swimming earlier by leveling my body with the ocean instead on wading further in. Went prone, I was about a foot under the water now, not swimming.

I was like "ok lets just go further so the game knows I am in deep water.
*SNAP*
All my bones break in my feet and my legs underwater. Had to roll back to shore before I drowned.

All my items that were used below my waist were ruined.

I don't think the game was designed with titan strength rip tides in mind, so I think this is a bug.