Problem with UI Scale size for IOS

I am making an IOS game in which I am using 3 - 4 UI panels one over other.
I have set the UI canvas to scale with screen size and the resolution to 1920-1080.
still when I switch the aspect in the game mode ( for example 5s to 4s resolution)
the UI gets disturbed
I have even set the pivot point of every panel and every image inside the panel
still I am getting the same issue when I switch to any other aspects.
please help!!
Thanks in advance.

Canvas scaler >>Scale with screen size.