Keywords modified in
Lightroom CC do not sync back to
Lightroom Classic.
This is a known limitation, and
there don't appear to be plans to resolve it.
That's disappointing. But what makes it especially frustrating is that the behavior is unexpected and thus reads like a bug. In my case, I spent an hour troubleshooting synchronization between
Lightroom CC and
Lightroom Classic before looking online, and
discovering that it was "by design".
Given that, at minimum, it'd be nice to see a warning given when users attempt to add or modify keywords in
Lightroom CC for photos that are synchronized with
Lightroom Classic. That way, they don't make the mistake of updating their keywords in
Lightroom CC in anticipation that they will be available later in
Lightroom Classic. This could even be a one-time warning.
The goal is to ensure that the user is notified of the limitation since it's not otherwise intuitive or expected.
Jeremy