Hey :)
-No but i can say that i dont have issue like this on other Games.
-Most time if i'm stay for a while (Duviri Circuit the first rounds okay to catch fast as Operator the 3 Decree Fragments but after round 4 or 5 lagg). But sometimes realy fast in normal missions or Eidolon hunt, too.
-I used Madurai and Zenurik both same
-I'm mostly guest when i play with my Friend, never play solo
I activate the FPS in game to look for RAM issue, but there was no RAM spike 3,5gb was the highest
i started a Support Ticket with the logs, too. if you want to look #3438312
Greetings :)