[Champion Select] Typing "Marksman" in the champ select screen doesn't do anything anymore

So as an ADC main I like to type "marksman" into the champion list. Usually that would pull up all the marksmen I own so I can switch between them as I please. However for the past couple of weeks I've noticed this option doesn't work any more. The thing is that when I type a champion name it still brings it up, and if I write gibberish the champ list goes blank. But when I type "marksman" (I've tried it with "mage" as well), the entire champion list shows up. This is really weird.

Not game-breaking or anything, just thought I'd bring it up.