When we go to a search form (account listing for example) we see a list of accounts and pages. Lets say we go to page 100.

We can enter a search query and hit enter. This will filter the results but page will stay the same. So if the filtered results exist but have less pages than 100, user will see empty result.

So when we apply a search term, we must also reset the page number so that we see the results from the beginning.

Actually this happens with other filters as well, not only text search.