In the latest version, it appears that one can travel surface between SWP and either NA or SA. I guess this means you could go from Papeete to Easter Island on a separate ticket and pick up your xONEx again.

TRAVEL MUST BE VIA THE ATLANTIC AND PACIFIC
86N . OCEANS. ONLY 1 CROSSING OF EACH OCEAN IS
87N . PERMITTED. TRANSOCEANIC SURFACE IS NOT PERMITTED.
88N . EXCEPTION: FOR TRAVEL ORIGINATING IN THE SWP, ONE
89N . TRANSOCEANIC SURFACE SECTOR IS PERMITTED.