I found that some arrows (like crossbow arrows, wooden arrows, diamond swords) have rendering errors and their flight paths are skewed (although the hit position is correct, it looks like they were shot off center and then drifted and hit) : (

I'd like to confirm this same visual "bug" with all crossbows added by SpartanWeaponary on RLCraft Dregora, it doesn't happen with vanilla crossbow nor the Switch crossbow.
Edit: It doesn't happen with vanilla crossbow mainly because it doesn't shoot the bolt with the same speed as the heavy crossbows, so it's a matter of bolt speed.

I've noticed it doesn't happen when you shoot in the directions marked in green (look at the image), but happens if you shoot anywhere in between.
Edit: It actually happens in whatever direction you shoot, but it's less noticeable if you shoot in the direction I noted in the image.