Hello Scott,
Thanks for contacting Plugable support! I’m sorry to hear about this display issue through your Plugable Switch, but I’d be happy to help!
Unfortunately, our USB Sharing switch wouldn’t support your HP, USB-C Dock.
Our USB switch does not support USB-C connections but only USB-A connections.
Additionally, a USB-A to USB-C adapter wouldn’t support the video conversion needed for USB-C(Alt-mode) from your HP docking station.
We recommend using our USB sharing switch with a USB 3.0 docking station to achieve switching the monitors between systems.
Please let me know if you have any questions about this process.
If this product doesn’t fit your needs, I’d be happy to help with a return.
Thank you,
Omar D.
Plugable Technologies