Lightroom Classic 15.6 imports an XMP packet's channel curves only when it holds ToneCurvePV2012 and all three of ToneCurvePV2012Red/Green/Blue; any partial set (master + one or two channels, channels without the master) imports without channel curves. #416 read them whenever the master curve was present. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>