Same Issue
I got exactly the same issue. Processor is a AMD Ryzen 4800H with integrated graphics (no dedicated graphic card).
When I connect a monitor directly to my Laptops HDMI Output, everything is great.
Via the docking station its basically unusable, even Youtube Videos have a lot of fragmentation going on while playing. It seems like the signal is separated into several horizontal blocks and they get updated one after the other with a noticable delay between each block.
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