Player falls through the ship when logging in.

Other mods included (might be the cause, if so, I'll just remove this issue, haven't checked it yet sorry :<) :
Ancient Warfare 2
Codechicken 3.2.3 (AW 2 Dependency)
Optifine HD U G5

Mode:
Survival Multiplayer, using Aternos.org server to play.

Issue:
When player logged out and that player is on a ship, and then he goes back, once loaded he goes right through the ship and sometimes causing height damage and death. Might be an issue in loading the "ship chunk" or its just the player glitching.