2 of 3 monitors keep disconnecting on D3100

[awecomms]

I have a Dell D3100 dock, 2 Flatron W2442PA monitors and a HP elite display E231. This is all connected to my Dell Precision 3561 11th Gen I7, 64G ram with a 4G T600 Quadro.

I don't game it is just for work and I mostly write legal documents so not a heavy workload. Sporadically the 2 Flatron Monitors freeze, then disconnect simultaneously. The displays show a no signal message and then rearranges my windows to run off the laptop screen (screen1) and the HP (screen 4). Then after a few seconds, they reconnect, the windows rearrange themselves as they were and it is like nothing happened.

It may happen 3 times in a minute then not again for 4 or 5 hours. The first sign is a screen freeze then the disconnect.

If the dock is faulty I am happy to upgrade to a thunderbolt one but if it just a settings or config issue or if the monitors are the problem, replacing the dock won't help. The other 2 screens keep on working just fine.

I have the latest bios and software from Dell installed on the laptop and the dock, this problem existed in windows 10 and now in 11 and through many updates.

Would love some thoughts.

Thanks in anticipation.