I Created a new folder and files in it, and shared the folder. When they open a file, they see the contents of ANOTHER FILE. This is true both on their laptop and phone. And yes, they are opening the right file name. I watched. When I open the file, I see the correct file. I even created another new folder, copied files to it, and shared that. Same problem. Not such an issue here, as I'm sharing the files with my wife. (Is still a problem though, since she needs to be able to access the correct file.) But what if I were sharing a file with a customer, and the wrongly exposed file contained another customer's info? This is a critical failure!
No error messages.