I have monitor LG 29WP500-B UltraWide Monitor 29
Laptop Dell 7400 2 in 1
Windows 11 (uptated from 10)
In my case the problem was solved setting refresh rate to 74.99Hz
Follow the next steps
> Display Settings
> Select your monitor
> Display resolution: Recomended (2560 x 1080)
> Advanced display
> Select your display
> Choose a refresh rate: 74.99Hz (if you support 60hz then set it)
I hope this helps