Camera lagging after updating to iOS 14 in iPhone 6s

I am in the Apple Beta program. When i was in iOS 14 beta, I had camera lagging issues. I left it like that since iOS betas are unstable. Now, after updating to iOS 14 GM, i still face the problem. The camera had no issues when in iOS 13. Now the viewfinder is very choppy.

What is the problem? Does anyone using iPhone 6s face this same problem? How to fix the lagging issue?