Search by topicID Reply to topic

Hi,
I am trying to modify IP_Tracker to allow search by topicID, but the filter does not carry over between pages.
The lookup is working fine, but when I click to page two, the filter disappears and I end up with more hits.

Is this meant to carry over, or was the filter never built into the pagination because the searches were never intended to be more than a page?

I seem to have the same issue if I change the sort order. The filter is lost.