Is anyone else having issues with the client?

My internet is working just fine and I have good ping. I think the problem is coming from the client. I have moments in game where I will lag, but no ping spikes. It will freeze for about 5 seconds and then start back up. There are times where I will disconnect completely. Just before I decided to take this to the forums, I couldn't lock in during champ select. Not only is this annoying, but with how strict the afk rules are I don't want to be banned for something that is not my fault. Any suggestions would be great