I was just talking about how I had not one, but THREE naso's that just swam straight into my crispa on intro, like they just had no clue on what a nem is.
Pretty sure they thought it looked like a safe place to hide out!lol
Now mine were very young blonds, very small, so I probably would also suspect yours to be sick or something, but sometimes it just happens.
I would be inclined to carefully remove it, trust me, seeing naso bones spit out later is going to double your bummer...and it could potentially be an issue for the nem.