I have had this problem for at least the past three weeks.
It happens when I play for about 30 minutes and then turn on passthrough to grab a drink.
I can unplug and replug the battery to turn it back on.
At first, I thought it was because I'm using an 18W battery pack with glasses mode, and perhaps the battery is not outputting enough power.
But today I finally found out what happens. I saw an overheating warning popup.
And I couldn't turn it back on by unplugging and replugging the battery. So here I am, opening this thread.
I can hear the fan spinning and feel the heat coming out. But I don't think the fan is running anywhere near its maximum speed.
It seems like the situation has been getting worse recently.
VIVE XR Elite Software 1.0.999.350
VIVE Streaming Hub 1.1.8
VIVE Streaming 1.10.12