Pro 16 Plus - SD25TB4 | Windows boot is stuck on loading wheel

Hi there,

We have recently installed a SD25TB4 dock for a Dell Pro 16 Plus laptop and we are facing a strange behavior.

ISSUE :

Windows boots endlessly with docking connected

Symptoms:

• If we try to start the Windows OS with the docking station connected on a USB-C port, the POST goes fine but then the boot process is not moving forward. The "loading wheel" of Windows is turning endlessly and we never get to the login screen.
  
  
• If we try to start the Windows OS without the docking station connected on a USB-C port, the Windows system is loading successfully.
  
  
• If we remove the USB-C cable of the docking while the "loading wheel" of Windows is turning "endlessly", then the loading process continues straight away and we get to the login screen.
  
  
• No BSOD have been observed or any crashes
  
  
• Booting issue occurs everytime from cold boot with the USB-C cable connected to the USB-C port
  
  
• The docking struggles randomly to detect external screen connected to the DP port (sometimes it detects, sometimes not)

Hardware

PC: Dell Pro 16 Plus

Docking : SD25TB4

Thank you for your suggestions on this case folks.