Reproducible with:
1. Create a new 3D project
2. Open the Windows “Task Manager” (“Ctrl + Alt + Delete“ button combination)
3. Have the “Processes“ tab open and the “Unity Editor” row visible
4. Minimize the Editor window and move it next to the “Task Manager“ window
5. Focus the “Unity Editor” window (by selecting it with a left mouse click)
6. Observe the value in the “CPU“ column of the “Unity Editor“ row

Expected result: Value in the “CPU“ column is consistently low
Actual result: Value in the “CPU“ column is consistently high

Reproducible with: 2022.3.59f1, 6000.0.40f1, 6000.1.0b8, 6000.2.0a5

Reproducible on: Windows 10 (22H2)
Not reproducible on: No other environments tested

Notes:

* Testing equipment: i9-10980HK, RTX 3080
* Got ~15% CPU usage on all supported stream versions