I am about to say something that probably going to sound crazy but what if EKHID is just the episode before (like: before the Mixies band and before Camillot the King)
Well, at this episode the Mixies band was not really confirmed as a band and Camillot didn't have an axe, later Camillot got his axe and became a king and Jamzy made the Mixies band.
there was lack time of Tapsy and Trumpsy, the principal said something about the next month, maybe this hint for a new episode that will come not really far from this date but I am not really sure about that, so overall, if there is S8 episode I think it will be some years after EKHID.