Issue: The search results in our site for a query string (for ex:- "title") gives different search results in IE as compared to other browsers (Chrome, Firefox and Edge). When searching for the word "title" 13 results return in IE and 10 in the other browsers.
Compare the json data in the different requests (comparing IE and e.g. Chrome) using e.g. Fiddler https://www.telerik.com/download/fiddler to see if they differ. Are you logged in as an Editor or something like that in IE but not in the other browsers? That could make a big difference when filtering for visitors. It would be interesting to see the hits that differ and see if they have different permissions.
Compare the json objects in IE versus the other browsers. IE gets different JSON object with more objects as compared to the other browsers. The JSON object received in IE is different than in the other browsers for an undetermined reason.