Not knowing by experience but logically thinking how FOV works I think that left-right sounds might come from a wrong place.
A wider FOV compresses the landscapes on your sides into the front view area. On a monitor a wide FOV bends the wings of your plane forward to a V shape, your left and right become front-left and front-right. Also the proportions of objects will change, fat becoming slim and tall. But the sound will not follow the same pattern so the sound of objects in front left or right will come from left or right. And sounds coming from the rear angles will show their respective objects on your sides.
The same may or may not be true with VR but that's what my logic tells me.