The new client needs to be fixed and stabilized
The new client currently has multiple issues with slow and unresponsive inputs, particularly champ select. Many others, including myself, have been forced out of champ select and ultimately force a dodge because the timer is stuck at 0 or you can't pick. If you're in ranked, this is even more unfortunate as you lose 3 LP alongside the 6 minute penalty you receive. If you've already dodged a game beforehand, this increases to -10 LP.
There's multiple issues with the client I did not address in this, however there's quite a lot of them to name for.