This is a serious bug which allows the player to turn invisible and still be able to function and kill enemies.
The bug applies to Player and Player's Ship
This is easily exploitable and needs to be addressed as soon as possible.
The way this is achieved is when you teleport out you are prompted to choose a zone to beam into. The game by default chooses the zone automatically. However, if you have it set to manual selection the animation for teleporting (or warping out) will play, in essence removing the player. If you press cancel to stop the zone transfer you will remain in the instance. The player model is not restored if you cancel and you can still move around and shoot. No animations or sounds will play but the enemies will take damage but will not respond to attacks. The only way to undo this is to re-enter the instance.