A Microsoft file hosting and synchronization service.
We just ran into this. This is a terrible recommendation and should not be considered a long-term solution. Our company uses both personal and business OneDrive accounts with shared links. So far, we've seen this feature collapse only on personal drives. This is a big loss for the both the personal and business use cases as we regularly collaborate with contractors that solely use personal accounts. We cannot expect people to start mapping drives instead of simply using the file sync service.
The issues that we've seen --
a) onedrive desktop client didn't warn or notify of change
b) the web ui gives the impression that you can recreate the shared link. it immediately reports "unable to create link" with no reason, error code, or anything of useful.
c) we're sorting through dupes created on several shared folders created on desktops
d) via the web ui: owner of shared folder can create docs in the shared folder, but the change is not seen by anyone who has access to the shared folder.
e) via the web ui: non-owners of the shared folder can create docs and it is seen by the owner (and others).
It's more than just the file sync service horking links and converting them to .url files. Based on our quick test of the owner creating files but those files not seen by users, it appears there's a grander permission issue to boot.
Please get this fixed asap. This is impacting how we work.