[CLIENT] Client lag during champ select

During a ranked queues champ select the client's frame rate becomes very low, before essentially coming to a complete halt outside of the timers beside summoner champ previews. (ban or pick) This prevents me from interacting with the UI or interface, i'm still able to type in the chat, however i still cannot select a champion to pick or ban, which as you can imagine forces me to dodge. This is frustrating when it happens twice in a row as 30 min queues for something that wasn't your fault is quite irritating. I do not know how to re-create this bug so unfortunately i cant help further.