using book with touch or projectile launches spells with the aim slightly below what it should be, worked fine untill now

Happens after i dive into water, i have minecraft comes tp life mod (it changes the heigh of the player/skin) might interfere
Problem seems solved after crouching outside water

Its not just me?? I thought it was server lag

i have the same issue, though its not just slight- its a whole block lower than the players head- and it gets worse the further it shoots- 10 blocks distance turns into a whole 3 below what i want to hit- basically it looks like im casting from my feet. ALSO yup, i have MCA (minecraft comes alive) as well, crouching outside of water fixes it as someone else mentioned.

edit: after playing my modpack a bit longer, i find that its NOT an Ars issue, MCA itself is the issue since it also happens not just with ars, but Immersive aircraft-