A Microsoft file hosting and synchronization service.
For me it worked to remove the shortcuts that show as shortcuts (files) from my OneDrive folder. Uninstall and reinstall OneDrive, and from the online OneDrive environment (in browser), create a new shortcut to the shared folder. Whenever this synced again, the shortcuts show up as folders again and they behaved in the way they used to before, and my app on my Android devices aligned with this again.