spectator mode - mob view problems

when in spectator mode you can right-click on mobs to see there view. I had the debug pulled up and when I went into a creeper, spider or enderman, the debug it said 'Could not find uniform named InSize in the specified shader program.' Also, any mob I went into, the camera always faced the same direction no matter which way the mob was facing.

Hope you can fix it!

QWERTY