See that's the odd thing about it. We both have different progress but when we retread our steps and go to each individual chest location there's nothing to take. I'll put up screenshots later actually hut yeah. One example is for earth I have 4/5 and she even has 5/5. But when we go to search the locations they're empty which means obviously we got them before. And when we check the app for progress it still indicates that we're missing some. It's seriously baffling.

Does the number that you are missing match on the app and in the game? And you might still be missing a chest

No cos on the app it says I need 3 more. I have 3/5 on mars and 4/5 for earth. Everything else is 5/5. It seems to be the chest on earth. I googled it and people are having a problem with earth in particular as well. We triple checked every single golden chest location on earth and nothing. It just doesn't make any sense.