Thanks David,
So here goes:
1) what is your camera original?
mts h.264 1080p 25fps from Panasonic.
2) is there camera roll metadata for each clip and is it different for each card you imported?
No metadata for clips.
3) have you checked your sub-clips to make certain they have timecode, and does proxy timecode match timecode on the camera original?
I don’t use timecodes.
4) is there a pattern you see that you did f’ed failed to mention to us with regard to which clips relinked vs those that did not?
Nope.
I tried to relink one file (to a proxy file – DNxHD 36).
It linked as well as about half of the sub-clips associated with it and that’s it.