randomly appeared in antigone memorial?

was kinda distracted roaming around in nopileos fortune ii, and without notice im on antigone memorial, i didnt even saw what happened, i noticed i wasnt on nopileos anymore because someone attacked me and i went to see where my scouts where and why they werent following, they had no path to me, because i just spawned there?

i also just had gotten the mission for the hypeion, could that be it?