when client leaves select screen to load into game, it doesn't and just says "reconnect"

I tried downloading the PBE again, yet I still have it happen. It happened my last 3 games I tried starting in one for all, I haven't tried regular draft or other modes. I've no idea why it does this; regular League of Legends doesn't have this problem. It's just on the PBE. Not sure what is causing it to happen.
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