Display running on 30Hz

[Hoffen]

We can only get 30hz update freq on 1 of 2 screens!

Setup:
HP ZBook Studio 15.6 inch G8 Mobile
11th Gen Intel(R) Core(TM) i9-11950H @ 2.60GHz

Intel(R) UHD Graphics & NVIDIA RTX A2000 Laptop GPU
HP TB 280W G4 Dock wCombo Cable
Samsung LS32A80 (2pcs)
Procord Displayport-Kabel 1.4 8K 
use recommended Res: 3,840 x 2,160
NVIDIAS Video driver.
According to specs we should be able to get 60hz on both screens, but we can only get 30hz on one and 60 on the other one. This is very frustation and we have spend a lot of time trying different things but nothing has worked so fare.
Are there anyone here that can help us?

[Jupitero]

Hello.

Does the problem still persist?

Upgrade the Dock firmware first. Thunderbolt 3/4 docks have had loads of display issues. (not just HP docks but everyone)

Upgrade the GPU drivers to latest.

Check that the NVidia GPU is enabled and laptop is in Discreet or Hybrid graphics mode, so it won't be just Intel graphics.

Do not daisy chain the displays. Connect each to the dock with their own DisplayPort cable.

Do not use HDMI, it is limited to 30Hz in your ZBook.

Try disabling the laptop display in Windows to free up GPU resources. ("External displays only")

Try connecting one display via Dock and one directly to Zbook with a USB-C to DP cable. (Just for troubleshooting)

Check the settings on the Samsungs. They may limit the Displayport protocol version. Enabled DSC, or Display Stream Compression, if possible.