Samsung Galaxy S4 KitKat 4.4.2 update - BUGS! Air Gestures No Longer Work!

So I updated my Galaxy S4 to Kit-Kat 4.4.2 and now the air gestures no longer work. I can't wave to answer my phone. I can't use quick glance. Even in the gallery or internet browser none of the guesture registers. I can see that the sensor is on by putting the phone in front of another camera, but nothing is working. I've restarted my phone several times, but it would only work for a few minutes and would stop working again.

There's also a problem with the proximity sensor! During a call when I put the phone to my ear the screen would turn off, but when I take it off my ear to try to dial extension numbers, the screen wouldn't turn back on automatically, I have to press the home button for it to turn back on.

I also realized that after exiting an app and I want to go back to my home screen, the home button doesn't register, and requires a second press for it to go to the main home screen.

Anyone else experiencing bugs?!

There are way too many bugs on this update, please fix this!