[Q] Kitkat AOSB -> No volume buttons not working while in Next Launcher topic

Hello, my Note 2 was updated to AOSB, latest version with KitKat.
From the update the volume buttons only work when in an app - doesn't matter which one, as long as it's not the Next Launcher.

I use this launcher for quite some time without any problems, but since KitKat these buttons stopped working in the launcher.

Can anyone help me how to enable them again?