Minimizing and chat window bug

I'm playing league on OS X. For some reason, I can't minimize LoL client. When I click on the button, simply nothing happens. What's more, chat window is stuck out of the screen, I can't move it. Is this a bug, or can I solve these issues? I'd be happy to hear that there is a way to do that. Best Regards https://i.imgur.com/iMxnuAF - Minimize bug https://imgur.com/9xVxARb - Chat Window bug