What's This Sticking Out of My IVC...?

[timm9]

Hi All, I have searched with no results that match. 1982 380SL with 35,000 miles. I have been experiencing a miss at idle so I started checking for vacuum leaks, etc. and eventually pulled the ICV to clean. Upon closer inspection of the ICV there appears to be a piece of what may be plastic or rubber partially protruding from the interior of the valve. Is this part of the valve? Should I tuck it back in or remove it? Any suggestions, recommendations, etc. would be greatly appreciated!