Server maintenance and 2.1.1 update are scheduled for May 4. Check out the Sneak Peek of the update here:
https://kr-gf.line.games/noticeG/GC/AOS/ALL/inGame/997
Please note that the details may be subject to change due to unforeseen circumstances.
May Update Sneak Peek & Director's Comment
Source: Steam Community (opens in a new tab)