In the past, there's no official policy regarding this since server crashes are rare, but we've had more crashes in the last 4 months than the previous 14 years combined. In light of this, we'll make the following policy official:
In the occurrence of a server crash/reboot between midnight and 12:00 noon and the guild leader did not have the opportunity to pick up the treasures, the guild leader may contact the GMs within 12 hours with a screenshot of the castle's economy score. GMs will spawn chests manually as compensations. In the case of a server crash/reboot taking place between 12:00 noon to 23:59 of a day, then no compensations will be given.