HashCat does not show CPU consumption

[MA40]

Hello.
 
I have running HashCat on a dedicated server with Ubuntu 20.04 Operating System and GNOME 3.36.8 desktop.
 
The information of the devices is as follows:
 
CUDA API (CUDA 11.4)
====================
* Device #1: NVIDIA GeForce GTX 750 Ti, 1971/2001 MB, 5MCU
 
OpenCL API (OpenCL 2.1 LINUX) - Platform #1 [Intel(R) Corporation]
==================================================================
* Device #2: Intel(R) Core(TM) i7 CPU         980  @ 3.33GHz, skipped
 
OpenCL API (OpenCL 3.0 CUDA 11.4.56) - Platform #2 [NVIDIA Corporation]
=======================================================================
* Device #3: NVIDIA GeForce GTX 750 Ti, skipped
 
The problem is that the HashCat System Monitor does NOT show the CPU consumption, (it shows 0%).
 
Why?

All the best.