I’m using the external search form like at this demo to have a Start and End date filter which works fine. The issue is once I fitler by the date range I then want to use the Grid built in column header search boxes to continue filtering down the data. It seems that this does not work as if I search within the Grid column search box I lose my external search form start and end date context. Any help please?

https://www.gridphp.com/demo/demos/search/search-form.php