Limbs disappearing!

[D A R K S ! D E]

I have a huge problem!

 

I was just playtesting as a custom character I recently made, Anakin Solo, and noticed that if I stand like a meter away from the character model while in-game some of his limbs (ie: his head, hair, and legs) suddenly disappear?? They just pop in and out depending on how close I stand to the character.

 

Does anyone know why this may be?? and does anyone know a fix?

Any help at all would be very much appreciated!