This happened, 33 years ago:
One of the strangest errors in comics publishing history, to be sure.
This error has now reverberated down through the ages. My guess is the digitization team digitized the issue #6 that had the contents of issue #5, then realized their error at the last minute, so they pulled the issue from release. My hope is that they’ll digitize and tack on the “real issue #6” to the end of the series. My expectation is that we’re never going to get the “real issue #6”. 