if i found a match and i want to do something like spend bloodpoints or change my loadout everything is laggy
ONLY in Lobby
that's since 6.1.0 Mid-Chapter (Prestige Update)
Try looking in settings too during a lobby. I found out it's laggy for me too on the Xbox Series X
Update: For some reason everything is smooth again for me lol
I have been having the same experience on PS5 since the mid chapter.