I see what you mean now. This behavior is also caused due to navigatable feature. The reason for it is that the Grid table is the focusable element and when it receives focus the browser performs scroll into view action. There isn't a way to prevent this browser behavior.
For IE, where applicable, we are using setActive method instead. It does essentially the same as calling focus, but without the scroll into view part. This is the reason for seeing difference in the browsers.
Unfortunately the only thing we can suggest, if you don't like the current behavior, is to disable built-in keyboard navigation and have own implementation for it.
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