We usually play F1 together as a family on PS5 using LAN Game mode, almost every day. Since September 16, we've noticed the frame rate starts dropping after about 40–50 minutes of play, and it gets progressively worse the longer we continue. Closing and reopening the game temporarily fixes the issue.
This wasn't happening before — we used to be able to play for much longer without any problems. All of us are using PS5 Slim consoles, and we're all experiencing the FPS drop at roughly the same time during a session.