It turns out that some of the players of Citadel: Forged with Fire are using underground structures for rather nefarious purposes. Not the fun sort of supervillainous nefariousness, either; these structures are squatting underground in places where no one is supposed to be able to access reliably, making the structures impossible to siege, preventing people from accessing loot chests, and otherwise blocking access and damaging the game as a whole. So the developers are planning to get rid of them.
Of course, some of you may just have a cave lair that you thought was really cool, so you’re getting a two-week notice and a warning that you should move your stuff out of glitchy regions. After that two weeks, players will be unable to build in a number of different areas, hopefully stopping these hiccups from happening and keeping things fair and fun for everyone.