"Your search did not return any results." after page 40.

I am trying to find an Unlimited comic that I read a long time ago, so I'm going through the tags. I use an advanced search, and if I add the "Unlimited" tag, if the search results are over 40, I can't go to page 41. The website says "Your search did not return any results" even though there are 130 pages for my search (after clicking last while scrolling through pages, it'll tell me what the last page is in the URL, but displays the message stated in the topic title). Happens on the Android app as well.