Yeah. I have no idea. I have tried going back and forth between stock and transparent, both with gravitybox on and off AND uninstalled and reinstalled xposed framework. I'm running stock 4.4 KRT16S. I've tried both the original and your updated one specifically for that build. It's all the same. Switching back between stock and transparent changes the status bar just fine, but the navigation bar stops being transparent. I've even tried it both with and without the override system settings on the navbar settings of gravitybox both on and off.
Now it IS still transparent in landscape mode. If it helps. I am using Nova Launcher beta. I have tried both enabling and disabling the seperate "transparent navbar" setting in Nova launcher but with no effect (except when the mod is working, turning it off and on properlly disabled and enables the transparency for JUST the homescreen. (BTW, when I say the mod is broken on the navbar, I mean on the homescreen AND lockscreen.))
If it helps. I'm using a modded version of gravitybox as the official up to date one removed kitkat support. v2.8.0 modded with Kitkat support. Specifically, this apk:
http://forum.xda-developers.com/showthread.php?t=2554049 It shouldn't have an effect though as it works with this xposed module just fine for a little over a day and then the mod is just half disabled out of the blue; my navbar is not transparent, status bar still has transparency just fine.
I dunno if any of this helps but I would love to get this working again.