Iv'e recently encountered this weird issue. It's been happening about a week now. But, if i plan on getting on HiFi in desktop mode SteamVR keeps launching. I am not sure if this is Steam's issue or HiFi.. but it launches even if I change some settings around on Steam's side.
I have had SteamVR since I started playing in vr this year so I am not sure why its doing it now.
I apologize if this is in the wrong place. Not sure if its Hifi or Steam.