We now have treasure chests on the map that will appear in random locations. These may say unlocked, but actually require lock picking skill to open them.
I found the following information that explains the issue:
Some treasure chests need better lockpicks to open. You ask how do I get better picks? Go find chests that are open already and loot the lock picks they give to them use on the ones you cannot open by picking them.
It's not a bug just a confusing text issue.
It really needs a better lockpick to open not a GM to fix it. Best lockpicks you'll find are in different chests.
Three kinds exist from what I have seen.
Easy already open ones
Medium need key ones from easy boxes or your own
Hard chests that need either keys from easy or medium boxes to open.