I have created a custom module in backend to display the search results of 'imei' in admin grid.
1) below is the home page to search imei.
2) search result page.
3) after searching i enter the value say for example 23 in imei text field search.
4)now i going back to home page and searching another value.
5)but now i get no records found, but there is records for that particular search.
since this happens, i have to reset filter on loading collection.