Found Bug W/ Rune Pages and matchmaking dodge

Hi, I just encountered a small bug. I was in matchmaking queue for ranked and I already picked my champion. I was looking at my rune pages and deleting some of my unused pages.

While In the process of deleting one someone queue dodged leaving the popup "Are you sure you wish to remove this mastery page?" Whether I push yes or no the popup does not delete and stays where it is. The next game was found but since I am unable to click anything I was not able to join. The screen is grayed out since the popup is open so I am unable to click the close league of legends button also. I used control alt delete to finally close it. It now works fine.

Hope this helped!