I tried to set z-index but it doesn’t change a thing. I am guessing that that a div from another section can’t step over a section if it’s not set to Absolute ?
Well, your header elements that are usually right below the dropdowns all have some super high z-indexes like 7000. Dropdowns hide behind them. I am not sure why you need these z-indexes but if you remove them nothing seems to be broken and dropdowns work as expeced.