Bugs after patch 4.21

I have a lot of bugs after the patch 4.21, the first is that a lot of time the game crash during loading saing that there was a connection problem, but my net is fine. another bug is that i had some problems with play pvp, i have ranked restriction but somehow i played a ranked yesterday while i wanted play draft . the last problem is the game show me attempting to reconnect during game but it is all fine, and sometimes the game freeze and then it crash. These problems are making me crazy, please solve it. Thanks

ps. (sorry for my english)