Just to let those who don't keep updated on the discord know.
Update to 1.13 was postponed
Currently the map might stay instead, removing region files from nonpopulated areas if feasible.
Creative is running 1.13 but the server does not yet allow that client. Since it's running 1.13 it causes some weirdness:
Currently not possible to walk through doors, walk on slabs, place beds, chests look like ender chests but behave as normal, might be more.
Equestria have been taken down for now