Hi,
You may have to check and change your configuration on the site search tracker. By default the analytics tracker will look for the “s” query string, but in your case the search is configured to redirect to a custom URL, where this query argument can not be used.
On the google analytics administrator panel, on the site search settings, try changing the Query parameter to “asp_s” instead of the default one: https://i.imgur.com/hLRb4vc.png
