What is causing the line on the left side of the right eye? [VR]

In my most recent build I’ve noticed a line going down the left side of the right in VR. I checked a previous build from an earlier version of Unreal 4.10 and it doesn’t have the line. I think it has something to do with post processing but can’t quite figure out what’s causing it.


After some more testing it seems to come from Auto Exposure. I’d like to be able to use Auto Exposure tho.