Dock shut down when Dell WD19TB is connected with MacBook Pro M1

Hi all,

Currently I have problems with my DELL WD19TBS dock and I was wondering if someone else has this problem. 

The problem:

I didn’t use the dock for a few days. Suddenly, it’s not working anymore.

I connect the Dock with the MBP, the LED on the TB cable lights up, the monitor flashes shortly, and finally the LED on the TB cable goes off and that's it. It feels like the dock is crashing and shuts down. If I connect the MBP and the dock again, the TB-cable-LED will not light up again. I have to restart the dock (but the problem repeats).

My setup:

I am using a Macbook Pro (MBP) 14-inch M1 (2021) with MacOS Ventura 13.3.1 together with the DELL WD19TBS Docking Station. For a Dual-Monitor setup, I connected a QHD monitor via USB-C to the Thunderbolt (TB) slot of the dock, as well as a simple 60Hz Displayport (DP) monitor. This setup is approved by Dell and was working for the last months.

What I’ve done so far:

I re-started the dock by disconnecting all cables for a couple seconds and holding the power button ("hard reset"). Once I plug in the power cable to the dock again, the power-button-LED of the dock flashes 3x. This should indicate the self-test is passed and the dock is fine. However, this does not solve the problem.

I also tested the dock by connecting only one monitor (both of them separately). But the problem stays the same even if I have only a DP-monitor connected to the dock. So, I assume it is not a problem with my setup.

The questions:

Does someone else have this problem or experience with this docking station?

Docking stations are know to be not reliable. Is my WD19 broken?

Could this problem be cause by software (i.e. the current OS version)?