[CRASH] Crash During Champ Select Draft Mode

Have been having no problems playing ranked, played about 7 games over the past couple of days. But all of a sudden my last games crash every time in Champ Select. This only happens in ranked, draft mode, as I'm able to play blind pick just fine. It crashes as soon as it begins the first ban phase. Has cost me promos. I'm running Windows 10, and I've never had this problem before now. Thanks.