They are ending for a year. Because they want مزید chapters before continuing. Its just like the grand magic games, they left in the middle of the arc, and thats what they are going now.
no offense but... SPOILER ALERT FOR THE MANGA NO OF COURSE NOT THEY ALREADY DISBANDED ONCE AND IF U READ THE MANGA WHEN MAVIS'S GHOST GOT HIT WITH A SPELL THE CRYSTAL TO FAIRY دل BROKE