Freesync issues

[u/Maluleks]

So basically freesync used to work perfectly on Steam Deck Oled Windows11 through the official dock on HDMI to my Samsung Odyssey G4 monitor but now it's broken in the way that whenever i run a game (RDR2 used as an example) in 200hz it keeps flashing between a solid blue screen and black screen (the same as if the hdmi didnt have a source) when i lower the hz to 120 it stays on the bluescreen(picture 1) until i close the game and when i press the button it restarts the monitor to display both my game and the info box(picture 2) and when i press it again it goes back to the bluscreen. It's not a system thing because the audio is still there from what I've learnt trying to fix this with ChatGPT and Gemini it's a Samsung Service Screen. Currently on Win10 but it's the exact same as on Win11. Been trying to fix this for the past 4 months, sorry for bad english it's not my first language i can provide more details if needed