There's been a bit of an issue where when not many/or any items are equipped and just the invisiplayer and an aura are equipped where the aura stays in one spot not moving with the player. I can't say every item this is a problem with, however i have noticed that certain back items such as "purity wings" on the model i use doesn't change this fact. Images below to sort of show what i mean.
I see items stuck/floating sometimes, usually it's other players. Guessed was some kind of sync issue but has been around a long while so may not be fixable.
It would be nice to be able to enjoy using invisiplayer and aura without having to use certain items, but if it's a case of not being able to be fixed or not being able to be easily fixed then it's understandable.