Luck is grabbed every time a digging session is initiated.Hi @Kyronix - So if I am to understand this right. I can go around and pre-mark by starting the dig then cancelling. If I later go back and re-dig with higher luck it should use my higher luck since it seems to spawn a new chest for each dig session.
The bug with the leftover chests occur when you get the message "You have found the treasure but something is preventing the chest from being dug up." I'll email that to bugs. I've tried unlocking the extra chests for more loot, but they are out of reach - so not a very big bug, just a quirk.
I've also been getting/doing maps where the treasure is under a house :/ Could have been transferred from another shard I suppose.
Thanks!
For maps that are under a house, your best bet is to put them away until they reset with a new location.