Since he was in the Treasure Planet, Aster couldn't directly go to his mansion at the Twin Sword valley and had to go through the portal to the neutral city and then return to the Battle Planet, which honestly he found annoying.
'I'll have a talk with that old man, since he is in charge of the security of the sect, he should be able to give me an extension of authority, to go to the territories of the Battle Peak directly from the mansion, at least for the three planets near the Battle Planet', thought Aster, referring to Salazar.
Supposedly, the reason as to why going from one planet to another is only allowed for the punishment elder, of the law enforcers, as well as the Supreme Elders and Ancestors, is for security.