This problem also occurs with me, it starts when I click on OK on the panel that said that the play area is too small.
It isn't visible on the video, but SteamVR goes crazy and then crashes. When I launch it again, the game exit itself.
Here's my comptuer specs :
AMD Ryzen 5 2600
16 GB of RAM
Geforce GTX 1660 Ti
HTC Vive
The fact that I also have a 6 cores (12 threads) processor, led me to try the workaround you mentioned. Since then, no more crashes.
So, for sure, the problem is how the game handle those extra cores.
Edit : Tested with the latest version (v_0_3_10_189).