This issue is related to “World Visit System” available in Patch 4.57.
Steps to reproduce:
Transfer to another world by the system, and join cross-world party from another world.
Upload battle-log obtained at the party, and register successfully.
The data of characters joined from another worlds to cross-world party has not been computed to Rankings page.
This problem is not observed with the characters joined to the party from their own world included in the log.
Thank you for your cooperation.