Monitors do not wake up after sleep (D6000 and XPS 13)

[welja]

I have a Dell XPS 13 (9370) connected via USB-C to a Dell D6000 with 2 monitors attached.
For years the monitors always wake up after hibernate or sleep. Since a few months they don't wake up.
So i have to pull out the USB-C cable, wait a second and then reinsert the connector. Then offcourse all my apps are on the primairy monitor so i have to re-position all of them. Highly annoying.

When the monitor's and laptop are asleep for 30 to 60 minutes they will wakeup fine, only after a longer period of sleeping they won't wake up when the laptop is activated again.
If i manually push the power button of a monitor it says "No signal going to sleep"

I have the latest D6000 firmware (Dock_D6000_FW_Updater_A04_F1TXX)
and the latest Displaylink software (app version: 3,2,14,0 driver: 11,0,2412,0 )

Is this a known bug? Is there something i can do to fix this issue?