G850a: After 5.0.2 Update, Recent Apps button no longer works.

I'm in a bind here. I just updated to 5.0.2 on my G850a (AT&T variant), and now the Recent Apps button no longer works.



I've already reset the cache from the recovery menu, done a hard reset, removed my account from the stock email app, etc, but nothing seems to work.



If anyone has any tips or advice, I'm all ears.



Thanks!

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