The Folgio do have an habit of stalling periods since .. pretty much the Mechaisburg arc (exihibit A: How long sis we pend in der der kestlle ? Exhihbit 2: .. Everything about the beast train)
I suspect it has part of the overall plot having ballooned way beyong it's original intention so they have to introducead rethink new things so the overfall thing make sense and likely some tig to do so the all the respective arcs are about the same sier for kook purposes.