Dedicated 'tv14' stable/preview APT repository streams removed?

We've set the APT sources.list file to use the dedicated "tv14" stream for updates, so we don't automatically upgrade major versions (i.e. we're using 'deb http://linux.teamviewer.com/deb stable tv14' instead of 'deb http://linux.teamviewer.com/deb stable main'), as is documented in the list file itself.

This has been fine until sometime recently, but it seems the tv14 stream has now gone away or become inaccessible.

If you try to curl it directly:

# curl -s -o /dev/null -w "%{http_code}" http://linux.teamviewer.com/deb/dists/stable/tv14/binary-amd64/Packages
403

But if you try the "main" stream, it still works:

# curl -s -o /dev/null -w "%{http_code}" http://linux.teamviewer.com/deb/dists/stable/main/binary-amd64/Packages
200

And even trying the dedicated 'tv13' stream still works:

# curl -s -o /dev/null -w "%{http_code}" http://linux.teamviewer.com/deb/dists/stable/tv13/binary-amd64/Packages
200

So it seems like it's just the tv14 one that is broken/missing.

Can someone confirm that this is something permanent or if it's just a mistake? If it is permanent, please can you update your documentation and remove the information from the APT sources list file (that is currently included in the most recent release). Or if this is a mistake/config error, please fix.