Default [Q] Slow Wifi with Note 3 on Airport Extreme

Hey, guys. I'm wondering if anyone else has experienced this.

I have an last generation Airport Extreme. Everything has been fine with all of my devices until recently. The only thing that changed is that I got an update for the Airport Extreme. Now, my Note 3 and ONLY my Note 3 is super slow on Wifi. I don't even get 1 mbps download. I tested several other Android and iOS devices and they have no issue. I checked all of the wifi settings on the Note and I can't see anything else that would cause this. I power-cycled my router and there has been no change. Everything else in the house is getting good speeds.

My Note 3 used to work perfectly fine on my AE, so this is definitely new. Anyone experience something similar or have an idea of what it might be?