Coöp disconnect, TOTY live event ONLY (ps5)

When i join a friend, and play the TOTY live event, i get disconnected 9/10 times like 5 sec in the game. "You lost your connection to your opponent. We'll check the match report to see who won and who lost." 

its only in the toty event, bc rivals just doing fine. 

Is there some fix? I tried restarting my ps5, reinstalled the game. Its just coop TOTY live event.