I don't think the extractor has anything to do with it. The shortness of the case, causes it to swing out of contact with the ejector. As the case is pulled from the chamber, the case mouth clears the cut chamber and swings into the lug area, since the case is really short it rotates farther out, to the point where the ejector is no longer pushing.
It seems the easiest way to correct, would be to extend the ejector. The amount the eject extends is controlled by a relief cut into it's side for the retaining pin. If the relief cut is extended, this would allow the ejector to extend. It could look a little strange since the bolt will have ejector protruding out past the front of the bolt.
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