Mobile Menu Header always on top

Hi,

In Product Archive Page in mobile when we add filter option, then we are not able to close the sidebar of filter in mobile, as mobile menu header comes in top position, when we click close button in filter sidebar ,then some mobile header option gets clicked because mobile header always come up in top position.

Similarly, when we click on zoom in product single page in mobile, then we are not able to close that as again mobile header menu comes up in top position.

How to solve this.