What happens is when you remove the extrator the ring that hods it unsprings slitghtly and catch in the lug slot/ Just reromove the bolt stop and with a small screw driver pry gently under the ejector ring via the bolt stop wind and bolt will slide right out. This happened to me a few days ago and it was driving me nuts. Because the instructions I have for my head space gauges say to remove the ejector and as you my bolt went in so far and stuck. It was the ejector mounting ring that expanded slightly hiting the locking lug slots that was the trouble.
Hope this hells Kind regards all.