KB5068861 breaks mirror networking with VPN

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### Windows Version

Windows 1124H2

### WSL Version

2.6.2.0

### Are you using WSL 1 or WSL 2?

- [x] WSL 2
- [ ] WSL 1

### Kernel Version

6.6.87.2-1

### Distro Version

Ubuntu 24.04

### Other Software

_No response_

### Repro Steps

After the update is installed, no longer able to access network resources on VPN. Able to access to internet, only seems to affect VPN. Uninstalling the update restores accessibility to network resources on the other side of the VPN tunnel.

```
> type ~\.wslconfig
[experimental]
networkingMode=mirrored
dnsTunneling=true
```

### Expected Behavior

Expecting to be able to access network resources on other side of VPN tunnel post-KB5068861.

### Actual Behavior

Attempts to connect or even ping hosts on the other side of the VPN tunnel fail. These errors are logged in the kernel dmesg output:

```
[ 7.468330] WSL (218) ERROR: CheckConnection: getaddrinfo() failed: -5
[ 7.501055] WSL (218) ERROR: CheckConnection: getaddrinfo() failed: -5
[ 7.537935] WSL (218) ERROR: CheckConnection: connect() failed: 101
```

### Diagnostic Logs

_No response_

No source file or test is named. Reproduce on WSL 2.6.2.0 with mirrored networking and dnsTunneling enabled, comparing behavior before and after KB5068861; inspect the reported dmesg errors and VPN connectivity. Done means VPN-side hosts are reachable without uninstalling the Windows update.

Written by the indexing model from the issue text.