i have found this Service Manual for the LG G3 D855. :good:
I hope this is allowed to share here at XDA. :confused:
If not...delete this Post and go on ;)
Content Info in Spoiler...
Okay, I've found a solution for the root problem.
Simply use xprivacy and select the options for the Remote play App.
Block under System (installed apps) the following query:
Finished.. Now you can leave supersu installed ...
Activate the expert mode in xprivacy
GravityBox = Godmode
Nothing to say... All arguments are invalid... :D
Best xposed mod so far...