Scoreboard flashes repeatedly on screen while using wireless m&k on PS5

I had the same problem. I changed the scoreboard keybind from TAB to another key, then switched it back to TAB, which fixed the issue. It was really frustrating, I couldn't play properly. I also had the same issue when driving vehicles in the game—WASD was switching seats. I updated the keybinds to 4567890, and now I can drive vehicles normally.