I've had this Laptop for a year or two now. I've been using it with an HP Zbook Dock Thunderbolt 3 dock the entire time. I have it hooked up to an External DP monitor, External USB drive, Ethernet and mouse/keyboard.
A month or two ago, I updated the OS on the laptop to Windows 10 64-bit 1909 release. At this time there were a bunch of drivers that were updated on the laptop, including Thunderbolt drivers. Prior to updating to Windows 10 1909 and updating drivers/thunderbolt firmware on the laptop everything was working fine.
Now when I boot up the laptop, it doesn't recognize any thunderbolt devices until I log in using the laptop built-in keyboard/mouse. Anyone else experience this?
I have all the latest drivers/firmware on the laptop. I have all the latest drivers for the Zbook Dock. Looks like the last driver update for the dock were in 5/2019.
I don't know if it's possible to rollback thunderbolt drivers on the notebook, because I think there may be firmware that goes along with it. The current Thunderbolt 3 Drivers on the laptop are 188.8.131.52 which are actually part of SP100927.exe (184.108.40.2060 Rev B).