My App saves files using the UIDocumentPickerViewController. This works from iOS 17 to 26. Usually, you have a file with a given name in your sandbox, which you can then export via the pickerVC. In the pickerVC you change the name. In iOS 27 the file name is greyed-out and you can't change it here. The file can be exported only with the pre-given name. Is this a new behaviour or bug in iOS 27?