When searching your favorites (just found out about it through the message of the day today), the total page number at the bottom of the screen will still reflect the total amount of pages in your favorites, versus the amount of favorites that apply to the search term. 

For example, I have 80 pages of favorite saves. When I use a specific search term, a half-page of saves is returned. The page counter at the bottom still reads "Page 1 of 80", but pressing next says "No saves found".