champion select glitch, causing inability to do anything

When in champ select,At random times, i have gotten it once the instant i have entered champ select, and twice when i changed my summoner spell.my window turns down in shade and becomes slightly blurred. i can see everyone else able to perform actions but i am unable to do anything, including: pick a champion, change runes/masteries, use chat, and of course change summoner spells. If there is a fix to this bug please reply to me for it is very troubling and i have received an abandon because of it,