There is no way to remove generally this option because it is a pro-active action. The ScrollToVisible is performed if you use option SimulateRealClick from the "Click" step properties. If you don't use this option it is not performed.
The problem in this case will be if you'll need this action despite the fixed header. Then you have to change the the scroll to be not to the top of the page but to its bottom.
I hope this explanation is helpful.
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