Yoga c940 15" aluminium chassis flexing?

I noticed that when I lift the laptop by the sides -- 4 fingers on the edge of the bottom plate and thumb on the sides of the keyboard -- the edge of the bottom plate bends upwards and goes UNDER the keyboard chassis. Unfortunately I don't have pictures and already returned the laptop due to other issues...

Does anybody else have this flexing? Is this normal for c940 & Lenovo aluminum laptops in general? I saw that there were not many screws securing the bottom plate.

Asking because I need to decide if I want to reorder

Edit: I've used macbook pro and thinkpad t470 neither flexed like this

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