Possible bug when viewing submissions with a filter

If i view "Fresh" or "Popular" art submissions using a filter (ex; transformation or squirrel), I will get one screen of artwork. Then scrolling down, I get a long blank section and then more artwork. Ex (using "squirrel" as the filter):

If I don't use a filter, there isn't a large blank area, though there is the occasional 3 or 4 blank squares in a row.