I was playing around with the compass and found that If I have it in my offhand, and a bow in the other It would freeze my game. Sorry if this is not the best explanation, Im new to GitHub (I am using the latest 1.12.2 version)

Which modpack? Which mods your using?

Haven't been able to recreate this. As mentioned above, what other mods are you using? By freezing the game, do you mean your client freezes (low/zero FPS), or the server freezes (cannot interact with the world)?