Is it possible you pushed the center post down on the connector too far with an out-of-adjustment carto? One of the Eastmall cartos did that to my pass-
through. There was a post here from some fella that inserted a v-shaped staple into the end of the carto to add some more length to the center section. The staple looked like this: -v-.
That fix-it worked for me.
Perhaps Chad from Altsmoke can assist you better.