Very low performance with AMD Ryzen Pro 4750U

[irvis]

Hey,
Sorry to write it, but same here.
Tried on Ubuntu 20.04 and 20.10.
Drivers version tried 5.3.1.34 and 5.4.0-55.153.
Laptop:

• Processor: AMD® Ryzen 5 pro 4650u with radeon graphics × 12
• Graphics: AMD® Renoir

System:

• Gnome Version: 3.38.3
• Kernel: Linux 5.8.0-50-generic x86_64
• OS: Ubuntu 20.10

All works good, until I plug in docking station. Then system seems to behave like drunk old man. I get out of nowhere latency between click and run program, each window is fragmenting once moving, unusable, not able to work on that
as I recall on Ubuntu 18.04 and 18.10 it was ok. So I suspect drivers.

Do you think this can be connected with issue described here