099 2017.7180: TD crashes when SteamVR quits

Hi,
I followed these steps to use HTC Vive controllers without a headset plugged in : [url]https://www.triadsemi.com/2017/03/28/steamvr-tracking-without-an-hmd/[/url]
It works pretty well and I can use the OpenVR CHOP to retrieve controller data.
But when TD is running, if I quit SteamVR or if it crashes for any reason, TD crashes instantly (never seen that before). The windows just disappears without any error prompt, and the TD process also disappears instantly from the task manager.
I know that using SteamVR beta ( + modified configuration) alongside 099 beta is quite risky but it looks like a real bug and the perpective of using controllers/trackers without headset is very interesting for many projects !
Cheers,
Colin.

Windows 10 Pro
Nvidia Geforce GTX 1080 Ti

SteamVR Beta
TouchDesigner 099 2017.7180