After a while the server starts to lag, and this is noticeable in many ways; e.g. WoF being 2x faster than normal or time occasionally lagging back a minute. Restarting the server usually fixes the issue.
Maybe there could be an automatic server restart function during inactive hours (which is around 6-8 AM UTC, or 2-4 PM Manila time for me.) or a vote command for a manual restart for emergencies.
Additionally, after a bit of thinking, maybe the automatic restart should also be delayed when a boss is being fought, and would warn players 10 minutes in advance that it is going to happen.