Custom Resolution Utility (CRU)

[charpour]

First post here , hi all!
I was wondering if someone could help me with the issue I’m having. I have a 4090 and an LG OLED C1 and I’m trying to create a custom ultra wide resolution (3840x1600).
Using cru, I created a DisplayID 1.3 detailed resolution of 3840x1600 and 120hz (CVT standard). Restarted the driver and I was able to select the new resolution. Desktop changed to the new resolution, however I find it impossible to change active signal mode of windows to 3840x1600, it keeps showing 3840x2160. Tried to change gpu scaling settings from Nvidia control panel, list modes and apply in display properties, nothing works. Could you please advise me if I’m doing something wrong or if there’s some bug somewhere ?
Much appreciated