So I did a quest in Moria in the chamber of wheels. And it had a cutscene where i had to look at the guy, like my screen would follow him even though my body wasn't moving. But after the cutscene I found that whenever I would target someone it would do the same thing!!!!!!! I have no idea what option turns this off and it's incredibly annoying, I've just stopped playing altogether because fighting is such a pain.
It's a new "feature" introduced with update 6 - unfortunately they made the default toggle key "X" which is very easy to accidentally press during play.
Press X to turn it off. And I'd recommend going into your Options -> Key Mapping, scrolling all the way to the bottom and removing the X shortcut.