Notebook Boot and Lockup

For my ProBook 450 G6 recently "HP Firmware Pack R71" (version 01.08.03, SP98476) came available. On the UEFI side it goes through flashing the ~128MB of main firmware, and then tries to update some devices. Which gives the following error:

--

USB Type-C Controller Firmware Update failed on below Controller(s):

CCG5 (Single Port PD)

Info: Firmware initialization failed.

--

`.\BiosConfigUtility64.exe /Get:"my_settings_2.txt"` shows:

--

USB Type-C Controller(s) Firmware Version:
CCG5 (Single Port PD) : 7.6.0

--

End of April when I also dumped the settings this was the same version (7.6.0). Firmware Pack release notes say "Updates the Cypress PD firmware to v7.9 to provide enhanced compatibility."

The 'Intel silicon reference code' and 'Intel Management Engine' and UEFI firmware itself is correctly updated to the described versions.

I don't use the USB-C port for charging, so I don't have that kind of failure to charge that others report when the Cypress CCG5 USB Power Delivery chip fails to update. 

But I do notice that my USB-A 3.1 ports that I use for a dock are now much more sensitive to touching the USB cables or moving the laptop. Though this might be unrelated / unchanged.

Re-executing the EXE on the Windows 10 side does reinstall the UEFI firmware, but does not resolve anything, still the same error. I did not have any USB devices connected during the update. I have also tried running the firmware update without any charger connected. I have tried downloading the update with a browser, outside of HP Support Assistant, fails in the same way. I've tried running the peripherals updater menu item in the UEFI after a fresh boot, also fails.

Is there any other Cypress CCG5 firmware v7.9 updater available? Or any way to force it into a more receptive mode so the install succeeds ? Something like MacBook's Power Management Unit (PMU) reset.