Hello nicola/nonintanon,
In 3 outputs and with HDMI, I wouldn't wait for DisplayLink driver update as we don't control that output in that case.
I would recommend checking you run the latest third party firmware:
https://www.dell.com/support/home/us...-d6000/drivers
If you do already run that, I can help by reporting this to the manufacturer.
For this, only connect the monitor exhibiting the issue to the D6000 on the HDMI port, then connect the docking station using the USB-A adapter. That's to be sure the display is controlled by the DisplayLink chip.
Then, please use the diagnostic tool listed in the last link of my forum signature to collect the logs.
This will give all the monitor details so we can try and reproduct the issue in our lab and submit the report.
Kind regards,
Alban