[rboerner]

Originally Posted by agmikkelsen

This is the specific dock in question:
https://www.belkin.com/p/universal-u...NC002ttBK.html

I've also made sure that the displays function with the same cables, if I direct connect.

According to the information provided by the manufacturer, the dock you are using supports up to a maximum of two 1920x1080 displays (aka 1080P).

The dock does NOT support 1440P monitors.