Usage of driver 450.80.02 makes using maximum resolution impossible

I am using a RTX 2070 on Ubuntu 20.04 and the Dell S2721DS monitor, connected via HDMI.

As long as I use the 435 driver, everything on my system works fine and I am really satisfied with the performance of my Nvidia GPU.

However, once I update the driver, the maximum display resolution is reduced from 2560x1440 to 2048x1080.

What can I do to leverage the maximum display resolution using the updated drivers?

Update: The following driver versions also lead to the problem described above:

  • 455.23.05
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