"[VR]EARLYUPDATE.XRUPDATE'S CPU USAGE INCREASES IF THE UNITY PLAYER ISN'T FOCUSED ON" related bug

So we have the issue fixed in Unity 2018.3.10
https://issuetracker.unity3d.com/is...10minutes-if-the-unity-player-isnt-focused-on

I am using Unity 2018.3.14

Here is what happened:
https://drive.google.com/file/d/14sJOHhNObH_Jf6WMfRbJ0ttohBNMxRd5/view?usp=sharing

When I unfocused the Unity window, there was no change to the CPU and GPU consumption, but once I minimized the window, the CPU and GPU consumption went up and the FPS went up from 45 to 90.

This is what I have when I launch the game


When I minimize the window


I wonder why.