https://forums.adobe.com/people/Jao+vdL wrote This is by design. Lightroom CC cannot deal with the hierarchical keyword structure that classic can. Lightroom CC only has a flat keyword architecture so they decided to stop syncing the keywords between Classic and CC. It used to be able to but since the release of CC and Lightroom Classic it stopped doing that. |
Not really, Jao....it's never been possible to sync keywords between Lightroom (5, CC2015, or Classic) and Lightroom mobile (now including LRCC). The ability to sync Titles and Captions was added sometime during the CC2015 cycle, but never keywords (or Location data).
However , it is currently possible (though this may be a bug or loophole) to effect a one-way, one-time transfer of any existing keywords and Location data in an image from Classic to the mobile ecosystem apps. If you write metadata to XMP in Classic (either automatically or via the Ctrl/Cmd+S keyboard shortcut), before you enable sync on the image in Classic, you should find that any of the cloud-based apps will show that data. But as I said, it's a one-time deal.....subsequent changes to keywords or location data made in Classic will not sync to the other apps, and changes made in the cloud-based apps will only sync to the other cloud-based apps but not to Classic. Because of that lack on ongoing syncing between Classic and the cloud, this "feature" may not be very useful.