I have super raids enabled when I select stage 18 in Fire Knight's Castle and also on the multibattle screen.  I selected it to run 15 battles.  It won the first battle and I got the two rewards and it deducted the double energy, but it also stated multibattle complete 1/15 and it stopped. 

This has happened and been reported in the past by me and others.  I noticed this will happen sometimes when the dungeon is featured in a tournament.