whakawairua tuahu map can't exit previous portal

Hi Support,

Please assist me, I did the whakawairua tuahu map after completing the map I can't go back to the previous portal. Huge lost cause there's many unique items I wanted to go back to collect them.

https://steamuserimages-a.akamaihd.net/ugc/811055404672651468/91E5BB09C11636E4E1B14191178AE677A14A2691/



Please help.

ref no: 695,690,206