Business Notebooks

Hello,

last week on Sep 2nd my ZBook 15u G5 has been affected by high CPU usage on System process issue. I found 2 related topics about this issue:
https://h30434.www3.hp.com/t5/Business-PCs-Workstations-and-Point-of-Sale-Systems/Re-High-System-CPU...
https://h30434.www3.hp.com/t5/Gaming-Notebooks/High-CPU-Usage-System-ACPI-sys-GPE-L6F-Storm-Omen-15-...
However my issue seems to be caused by ATI Radeon WX 3100 graphic card or Intel UHD Graphics 620 drivers. During my research I found out that on September 2nd my Intel UHD Graphics 620 driver has been updated. Next morning I found out 20% CPU usage on system process and my PhotoShop can't run properly due a missing acceleration. What I tried to do was to install back previous Intel UHD driver - no changes. So, I set it back to latest version and then make an update for Radeon WX 3100 driver using devices manager. Still no luck. So, I downloaded latest drivers for Radeon card from producer website - it seemed to help however after another system restart problem backed again - 20% usage of cpu. Finally I updated drivers using HP WX3100 drivers package.... and ... NO! Still not. Still around 20% usage of CPU and no acceleration for Adobe PhotoShop. 
The very last thing I did was to turn off and turn on back Radeon WX 3100 in devices manager. This seems to help but I have to do this each time I turn on my laptop. 
Does anyone know how to fix this? Does anyone got the same issue? 

Any help is very much appreciated!
Thanks