Hey, sorry for the late response. Couldn't get onto a computer until now and the phone wouldn't let me login. I am using an i7-9700k. I sent a message into Vive Support and will update here when they respond. Hoping they have an answer for us.
I appreciate your work around. Unfortunately from the sound of it, it will not help me out very much though if the eye tracking lags. I am using this to test programs, software, and a video game I have been working on. It definitely isn't being cause by the vive facial tracker, since with eye tracking disabled, I can track my mouth with the facial tracker at 4% usage. Eye tracking with facial is around 40 to 45% for me, and without facial tracker it is about 35% to 40%.
Like others have said, even if I do not have the headset on my head, or any programs using it, it still drains 40% with the eye tracker. And based on what testamundo presented, 1.3.1 works just fine at about 8%.
I think there is something wrong with the 1.3.2 version itself. Both you and I shouldn't have any problems even with our weaker processors. I am surprised after how many months nobody else has mentioned an issue though.