I get this on one of my machines. I think it is related to having multiple displays (I have 3 monitors). I've also heard this can happen with DisplayPort monitors, but I'm not 100% sure that's the reason.
It's because SLI is enabled... it stopped happening for awhile when I had it disabled, I just enabled it and it started happening again. I guess it needs to sever the SLI connection while Home is running since Oculus doesn't support it.