[Client] Audio balance resets every update

I'm sorry if this is already a known issue, or if this is simply 'working as intended' but it's becoming rather annoying.

Every time the LoL Client updates, the game's audio balance resets to the audio level of whatever the loudest process on my computer is, at the time. This happens 100% of the time, without fail, provided that the game is updated in such a way where you are required to accept the user agreements again. For example, if I had LoL set to 1/100 volume before the update, and my loudest program at the time was Youtube at 30/100, LoL's volume would be set to 30/100 after I accepted the user agreements.

This bug is rather strange because, according to my friends, this has NEVER happened to them. But for me, it happens every single patch that requires signing the user agreements without fail. So I think this issue may have something to do with my hardware. Listed below are the specs of my two audio devices, along with the drivers they use. I got this information using DXDiag. If any more information is required, or if i should be using another method to get this hardware information, please let me know.

Sound 1 Name: Speakers (Plantronics GameCom 780) Hardware ID: USB\VID_047F&PID_C010&REV_0100&MI_00 Manufacturer ID: 1 Product ID: 100 Type: WDM Default Device: Yes

Sound 1 Driver Name: PLTGC.sys Version 7.00.0008.2157 (English) Date: 11/4/2011 7:47:58 PM WHQL Logo'd: Yes

Sound 2 Name: Speakers (VIA high Definition Audio) Hardware ID: HDAUDIO\FUNC_01&VEN_1106&DEV_8466&SUBS Manufacturer ID: 1 Product ID: 100 Type: WDM Default Device: No

Sound 1 Driver Name: viahduaa.sys Version: 6.00.0001.10300 Date: 2/17/2012 8:56:14 AM WHQL Logo'd: Yes