Whenever swimming with depth strider 3, it makes you go significantly faster, yes? And when you use a trident, you go very quickly through water if it has riptide, right? Well, whenever you combine the use of the 2, it slows things DRAMATICALLY, making you only move up to 8 blocks at a maximum while using a trident throw under water and when DS 3 is equipped. This clearly has to be a bug, otherwise, if i am wrong, i genuinely apologize and apologize for wasting your time.