When trying to get one of the Ymir's blood stones, I cant do it because a key I needed to unlock the chest is floating in mid air and it's not possible for me to get it. What should I do about this? It's quite close to Leyna falls and I need to collect 2 keys for the chest, the first by shooting a crate down and the key will appear on the ground (which is the problem) and the other where you need to shoot another crate down and you'll be able to go inside the log tower to get the key and then go inside the mine to open the chest.

When trying to get one of the Ymir's blood stones, I cant do it because a key I needed to unlock the chest is floating in mid air and it's not possible for me to get it. What should I do about this? It's quite close to Leyna falls and I need to collect 2 keys for the chest, the first by shooting a crate down and the key will appear on the ground (which is the problem) and the other where you need to shoot another crate down and you'll be able to go inside the log tower to get the key and then go inside the mine to open the chest.