Facing screen flickering issue after Plasma 6 update

I’m using KDE Neon for last 1+ year in my Lenovo Thinkpad T470s. It was working fine, but after KDE 6 upgrade I have been facing Screen Flickering in X11. So I started using Wayland sessions instead. It was working good. After 6.2 update with new Ubuntu LTS upgrade the screen flickering started to appear on both Wayland and X11 sessions. It starts all on a sudden, keeps flicking for a minute and then gone. Now the problem is occuring pretty frequently. What should I do?

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