Paul, a follow-up question for you: When you are syncing the (auto) WB from the source image to the other images in the selection, do the target images have other image settings already? That is, have you previously adjusted (in Develop) the other images? Or, is the act of syncing the WB the first thing that you do (before editing the other images)?
This may seem like an odd question, but the order in which certain operations are applied can make a difference in whether the bug manifests or not.
Thanks,
Eric
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