Game crashes to desktop after winning/losing

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Sometimes (but not all the time), my game crashes to the desktop with no notification or error message after I click the "OK" button after my team has either won or lost.

Opening up the task manager shows that the processes for League are still running, but I have no way to show them. The only way to start up League again is to close the processes with the task manager.

This has been happening since a few patches ago, I want to say four?