Others have seen this fixed with firmware 2.1.6, but it did not solve the issue in my case.
I am on:
Dock F irmware 2.1.15.0
on a surface book
with Windows 10 Pro 1703 Build 15063.413
and the external monitor is a:
G 34UM68-P 34-Inch 21:9 UltraWide IPS Monitor
Please respond with notes on what progress has been made to replicate the issue and what the timeline is for a fix
Thanks,
Daniel