Engine hangs / freezes when looking at certain points
In one of my projects, in fullscreen PIE mode and standard in-editor navigation, looking at specific directions causes the editor to freeze until the mouse is moved to change direction. Fraps and UE4's frame rate monitor don't dip or otherwise show anything unusual has happened, and the engine is still receiving input even though it's frozen, as I can unfreeze it by changing my direction, or hovering my mouse over a UI element.
This seems to have nothing to do with performance and does not occur in standalone VR mode, only in the scenarios described above.
This happens in 4.10.1 and the 4.11 preview.
This is probably hard to comprehend as written, but I'm hoping it's a known bug in which case someone should know what I'm describing. If it's completely unheard of, I can provide a video.
EDIT: The issue doesn't occur in PIE if diagnostics are running such as Stat > Advanced > SceneRendering. It's as if there is just a deadzone in my scene where the frames don't update if I'm looking in that direction, but having stats running seems to force it to update. The issue still occurs in editor mode even if stats are running. In this case the stats console also freezes with the rest of the editor.
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