I've seen the issue you're describing. It can cause the striker to intermittently follow the bolt carrier home, thus causing a dead trigger. You can attempt to round off the disconnector but you don't have much wiggle room. If I were you, I would replace the disconnector.
That issue is relative easy to replicate if you don't have a tabbed carrier on a VZ2008. Allow the bolt carrier to go forward slowly and hit the disconnector. And allow it to come to a full stop/hang up. That stop/hang up point is where the trigger slight depresses from tension on the disconnector... Should hold itself in place. Then slap or palm the charging handle to move the bolt carrier forward. 9 times out of 10 you're able to give yourself a dead trigger... Aka, one version of the gremlin.
However, when you fire the gun or rack it back fully and let loose, the trigger does not behave the same as it is a leverage and time action not an amount of force action.