Headscratchers / Persona 5 Tactica

• Are the Streets in Repaint Your Heart a Kingdom or something else? Jerri's final scene seems to point to the former, but if that's the case, why were Joker, Akechi, and Yoshizawa's recollection of the event wiped out upon leaving, but in the main story, everyone's memories stayed after saying goodbye to Erina?
  • Salmael is still around; he can likely tamper with memories.