bought all DLC, but cant see why its relevant, still adding it here, and otherwise only one addon, and even without it, problem still occur.
black edge around loading, allways happen, not been an issue before, so doubt it is now.
verifying local game cache does not work either, nor does a full reinstall of arma 3, with all things related to it(appdata folders, steam folders and documents folder) deleted. including all profiles.
my belief is that somehow the update from 11/11 is the one causing problems, as i played fine after heli dlc was released, but not after 11.
sorry for potential spelling errors.