Default Disabling Nav bar stops camera buttons working??

Hey all

I've never been a fan of nav bars, on previous phones I have been able to remove the Nav Bar and then use LMT launcher instead.

Although this causes issues on the G3, when you remove the nav bar you can no longer press any buttons on the camera app? Anyone got any idea how to fix this?
I've tried editing the build prop and using the lg xposed module and it happens on both

Sent from my LG-F400S using Tapatalk
Samsung Mobiler
O2 Guru

My Devices:
Galaxy Note 3 - Temasek Rom - Zerolemon Battery
Galaxy Tab Pro 8.4 - Crpalmer CM11