Reporting bug that keeps getting me kicked out of lobbies in new client

Bassically my moniter bugs and quickly changes scale sometimes and when this happens the client (when I am in a lobby) changes so a portion of the right side of the client disapears (up to the point where I can't see the face of the champion the enemy picked but I can read who they did pick) and when I go into masteries the x leave button isn't there, because of this I can't leave my masteries to lock in my champion!

Please fix this. I will fix my moniter but old client changes scale with the moniter doesn't make a portion of it disapear!

(very frustrating tried to word it nicely, moniter zooms in and out which makes portion disapear)

I just don't want anyone else in the futur to have to wait 20 min and lose lp or get out of a series because this small issue. Thank you!