Just a note that I have the exact same beeline eye to eye tail as the one in question, purchased from and spliced by the same company and it has not developed this problem at all in the 4 months of it's service. Could it have been a batch of splices made from a run of beeline which was not perfectly calibrated when maufactured at the Yale factory? ie. abnormal cover slipage?
Good luck with the refund/exchange.
Good luck with the refund/exchange.