Champion Select Issue - Critical Bug - Not Consistent

Steps to Reproduce:

1. Load into client.
2. Enter Queue.
3. Accept Champion Select.

Result: The Champion select music can be heard, but the user is not in champion select. Instead the user is back at the main lobby screen or if with a group, is looking at the groups lobby. Champion Select is occurring, and when the user fails to pick a champion the queue is dodged. Essentially, the Main Lobby or Team Lobby is visually and effectively "in front" of the champion select and the user cannot pick a champion or perform any actions related to champion select.

It is possible to "enter queue" while this is occurring but an error message will appear stating that you are already in a queue and cannot enter queue at this time.

Expected Result: The User enters champion select as normal.

Note: In ARAM the queue is not dodged, but runes, masteries, rerolls and summoner spells cannot be used or selected. Once the timer ends the loading screen will start as normal and the user enters game.

Note 2: This is not a consistent issue. It seems to occur more often after another full-screen application is run prior to entering champion select. It occurs with greater frequency the longer the client has been left on but has been noticed upon logging in and immediately entering queue (rare).

Note 3. It is seemingly possible to "reglitch" the client from the main lobby or team lobby back into the champion select but selecting shop exiting, minimizing and unminimzing and essentially just "spamming options". This has about a 50% chance to send the user onto the champion select screen.

Hey Riot, this occurs often enough that it's annoying. Unfortunately I don't think a screen shot will help as the issue is that another screen is taking precedence over the champion select screen. The longer the client has been left on the more likely it is to occur.