I have an XPS 13 9360 connected to the WD15 dock. I've noticed that regularly the external mouse and keyboard I have attached to it stop working.
Here are some things I have observed:
Steps I have taken to try to fix:
Any help with this would be greatly appreciated! I'll post any additional patterns I find.
This is admittedly a rather long shot, but try installing the latest Thunderbolt firmware for your XPS 13? I know the WD15 is just regular USB-C and that the USB-C controller firmware is updated as part of the regular system BIOS update, but I'm wondering if the Thunderbolt controller might still be in the hardware path somehow and therefore a firmware update there might fix something like this.
Such issues with USB on docks were reported to re-occur with certain recent BIOS versions. I mean, the WD15 wasn't useful with my XPS 15 9550 initially, but improved with certain updates.
Do the mouse & keyboard on the dock happen to start working if you turn on the Airplane mode (or disable the wifi&BT adapter in Device manager)? I finally got it working properly after replacing the wifi&BT card with the Intel 8260 (newer: 8265, 9260). Looked like some sort of interference between USB and wifi (RF shielding problem, driver???).