HELP! Home and Recent Apps key appears with a slight delay when unlocking phone.

So I just got gravity box and was messing around with it. Found the custom nav key setting which I found pretty cool. But after enabling it, I find that the home and recent button on the nav bar would appear with a slight delay after unlocking the device from sleep. The Back button would behave normally...only the recent and home button. I tried wiping cache. disabling Gravitybox and disable custom nav key. Problem still persists. help

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