After creating a bridge in Win11 observed a lot of TCP-retransmissions

[rhermsen]

System details:

WSL2: Ubuntu 24.04.1
Win11: 23H2 build 22631.4037
WSL version: 2.2.4.0
Kernel: 5.15.153.1-microsoft-standard-WSL2

.wslconfig:

[wsl2]
networkingMode=bridged
vmSwitch=WSL
dhcp=true

I have a HTPC with 3 Ethernet ports, one connected to my Internet router, and two on one NIC currently unused.
To free up a port on the Internet router I would like to use one of the free ports to connect a device with access to the Internet router.
This HTPC also has a WSL2 instance active which via Hyper-V Manager > Virtual Switch manager connects the vNIC of the WSL2 instance to the Internet router.

Starting from a good working condition, I configured a bridge in Win11 and added the interface connected to Internet and an unused port on a NIC.
(commands below)
This looked to work ok.

• The WSL2 instance obtains its normal IP address via DHCP, and is still reachable via SSH
• Also the applications running in the WSL2 instance are reachable.
• The Win11 host is assigned a fix IP address and, with that, is also normally reachable.

But on a TCP connection between the WSL2 instance and the Win11 host get a lot of retransmissions during video-streaming (e.g. recording or live-tv).
This is also causing very frequent buffering in the video application (Kodi).

Is this a known limitation?
Or did I configure it incorrect?

Bridge configuration:

netsh bridge show adapter
netsh bridge create "vEthernet (WSL)" "Ethernet 2"
netsh interface ipv4 set address name="Network Bridge" static <static IP@> 255.255.255.0 <gw>
netsh interface ipv4 set dns name="Network Bridge" static <dns ip>