macOS Tahoe massiv problems with Ethernet speed

Hi,

with the switch to macOS Tahoe on my MacMini M2 Pro I reached an Ethernet speed with 50Mb/s. A clean install of Tahoe had no effect. And I don't use any firewalls or other possible network software during my analysis.

The fallback to macOS Sequoia shows my full internet speed again. By the way I use the networkquality tool by Apple within the Terminal App to measure the internet speed.

Has someone same experiences or is this a bug by macOS Tahoe in context with a 10Gb Ethernet interface?