I'm having an issue with WD19DC (two units) and Precision 7540. Sometimes (~50%) when I plug in the dual USB-C cable just a single connection is established (LED on one half of the dual connector is not lit). This results in lower resolution on displays connected to the dock.
This is annoying especially when it happens multiple times in a row.
Additionally, sometimes when this happens, Windows forget the display configuration and I need to reconfigure display resolution and layout after successful reconnection.