The flexibility in the type cover means that when resting it on my lap or on the sofa, when I apply pressure onto the corners with my wrists it presses the right mouse click and so I end up switching windows or typing in the middle of the text above making it useless on anything but a desk or table.
Not impressed with this microsoft product and my first surface device.
I have a Surface 3 and a Surface Pro 6 with the grey alcantara keyboard and I can tell you that the two keyboards are completely different in quality. My Surface 3 type cover exhibited the same issues you are speaking of, but my Surface Pro 6 Alcantara keyboard doesn't.
I showed my Surface Pro 6 to my boss and the first thing he did was try using the keyboard and said "Oh....that's not like the Surface Pro keyboard I had. MUCH more durable and well built. The mouse even works better too. Typing is also really good. It doesn't flex as much..."
I know it's larger than the Surface Go, but I do have to say that I AM impressed with the Alcantara keyboard's build and quality. Way more than my Surface 3 type cover which was quite flawed.