I have implemented documentPicker to import files in my app. I can open other app extension and import file.
Issue is when I go to background. Suppose Dropbox extension is downloading a file to be imported and I press Home button. Again when I open app extension is dismissed and downloading is cancelled. On console Unable to setup extension context - error: The operation couldn’t be completed. (Cocoa error 4099.) is printed.
But for other apps like Box, OneDrive, iCloudDrive, extesion is not dismissed.
I opened Drive app and tried to import file from Dropbox and while downloading was in progress pressed Home button. Then opened Drive. But in drive, downloading continued.