Thanks for the suggestion but unfortunately i have not resolved the problem
Im using Lightroom CC 2015 and Adobe Bridge 22.214.171.124 CC. The files are .ARW files from a sony A57 . Only about 400 photos are showing up with labels. Some of the files with labels say they have a JPG sidecar file and an xmp sidecar file some dont. I tried the suggestion you made but I didnt get anymore labels. I have checked in Adobe Bridge and I can still see all the labels, but I cannot see them all when i access the files in lightoom.
Any help you could offer would be greatly appreciated
I Just found this recent post with the same issue:
"For the color labels to transfer correctly you have to make the textual descriptions for the individual colors identical in Lr and in Bridge - down to upper/lower case, commas, hyphens, underscores, etc."
You'll need to edit the Color Label Set in LR so it matches what you are using in Bridge. You can then save these changes as a new Color Label Preset. It works for me because I never changed the default label names in Bridge.
Lightroom Metadata> Color Label Set