Custom Rigs Float when inside each others humanoid root parts?

I just learned custom rigging and stuff 2 days ago, and i have been having some great outcomes from it.

The rigs look good and function great with animations, but the only problem is that when 2 characters are standing in each others humanoid root part, they start floating upwards and sometimes wont stop until one of the characters move.

This is a major problem as i am looking to make an open world game with multiplayer aspects.

I am just wondering if this is a common problem with an easy fix, or if its something i did wrong during the rigging process.

And i can conclude it is not a problem on the scripting side.

I will accept any help.

Thanks!

Example: https://gyazo.com/62ae7aad332fcb9b642320cf2f421e68