Trident is not in correct position and is appearing in the chest of the player when held in the hand.
The trident doesn't appear in the player's hand, instead it shows at the neck or chest of the player. It is visible in first person and third person front. I have a few addons on my world so I tried it on another world and the results were same
Steps to Reproduce
1. Take a riptide trident
2. Use it a couple times until you don't see the trident in your hand. OR Sometimes it can happen just by holding it in the hand