UCL Flash Event 1 Disconnects on Kickoff

When trying to play UCL Flash Event 1 on PS5, I get disconnected within the first 2 seconds after kickoff every single time. This has been happening consistently for a few days and around 10 tries. When reconnecting to Ultimate Team afterwards I get a “Disconnection Warning” as if I disconnected on purpose. I am unable to complete objectives due to this. Squad battles and Rush work fine.