I have the same problem - only on my second rotation, but several of the chests are already visually open, and are not interactable. The achievement is visible in the achievements pane, I'm able to track it, and the chests I'm having problems with show as not yet completed. But I did the chests in a somewhat arbitrary order the first time through, so I can't say how those which I can/can't open correlate to any past activity. Same here on 3rd rotation and all chest are open and I have 3 keys now they are not reseting
