On my old second device I have exactly these issue. 
	My plan was to reflash android, to use my new dispay on my daily driver (LOS 22.2). 
	Any ideas?
 
	Second device hast stock android 9 ; unlocked ; not rooted
 
	For my main Pro1 and my spare Pro1 I use the same adb drivers, notebook, usb cable and usb port.
 
	UPDATE: 
	I have to execute a batch file, to edit the registry of my Win11. 
	You can find the file, if you search: How to fix press any key to shutdown fastbood error 
	After that, I phone is still in fastboot mode