How would i go across preventing the player from floating up in water?

[EffilnuC]

I have seen a similar post on the dev forum dose this help ?

How do I make players not automatically float in water?

I’m currently having an issue in my game where players will randomly float to the top of water and it makes playing the game super hard. Is there anyway to prevent players from automatically floating? You can see whats happening in this game: