Please see the UDN for a potential fix/workaround description.
Download the licensee issue here - [Link Removed]
Open the console and enter "DebugCreatePlayer 1"
Turn player 1 180 degrees, the heightfog view in player 2's view will disappear.
There's no existing public thread on this issue, so head over to AnswerHub just mention UE-127669 in the post.