We're aware that Account Bound items could be lost when a house collapsed or an item decayed. Starting with the next server restart (October 16th), they'll be delivered to the owner's bank box instead.
Because Resource and Gear Chests are valuable, we'll consider one-time replacement requests for chests lost this way. Each request is reviewed case by case, and we can't promise a replacement. To request one: open a support ticket with your account ID and which chest you lost. The more details you can remember, the better: when you donated and how much, what you bought, and where the chest was placed when it was lost.
Note: items contained within Resource or Gear chests are lost upon decaying, the items inside them are not something we can recover. Sorry!