Similar issues to previous problems in `IMAGE_OT_open` and the `BKE_image` API... Relative filepaths of linked editable IDs must be relative to the ID's library blendfile, not the current 'local' blendfile.
Similar issues to previous problems in `IMAGE_OT_open` and the `BKE_image` API... Relative filepaths of linked editable IDs must be relative to the ID's library blendfile, not the current 'local' blendfile.