Strange behavior with model

So I may have encountered a bug with the BGE, It’s hard to describe with words but I can’t upload a video right now. basically when I look at my character from a certain angle, it disappears. The character has been linked from another project into this one, there are no transparent layers, when I put another modifier onto the model (ie triangulate) it works fine although with very bad performance as expected though. The character is also fine when I unparent it from the bones. i think it has something to do with the armature deformation but I’m not 100% sure. Even wierder is that when I look at the model in the game when it first starts it doesn’t happen, (the character is in view when the game starts) but when it isn’t this can happen. It’s very very strange.

Huh, thank you very much I’ll keep that in mind.