BIOS update causing issues with Windows 10 system tray

[LoxGuru]

I just updated the BIOS on my ZBook 15 from 01.38 to 01.39 through the HP Support Assistant and now the system tray (the icons on the bottom right hand side of the screen in Windows 10) either loads out of place or disappears completely. How do I roll my BIOS back to 01.38? Older BIOS versions are not offered through the HP website.

BIOS update:

System tray on bottom right hand corner of Windows 10 after BIOS update (there should be icons and time/date here).

Since the HP website appears to be having issues displaying the screenshots, I have added them to this Imgur album as well: https://imgur.com/a/KvzPiVN

[JamesJ]

I have the same issue with my zBook 15 Studio x360 G5, but I don't think it is the most recent BIOS update. It occurred for me after I installed the Windows 10 21H1 optional update on 5-26-2021.. The problem went away after I uninstalled it. But it returned after the KB4023057 & KB5003637 Windows updates of yesterday. I'll try uninstalling these and see what happens.

Update: Windows Update does not give me the option of uninstalling everything from 6-10-2021, except for a Security Update on that date. I uninstalled it and after restart the system tray problem (disappeared icons) was fixed. So I'm reporting this behavior to Microsoft.