Tailscale exit node breaks networking

**Describe the issue**
When I activate the exit node feature in Tailscale (basically instructing Tailscale to route all traffic through a machine designated as "exit node": https://tailscale.com/kb/1408/quick-guide-exit-nodes#use-an-exit-node), the networking of by Debian 13 VM breaks:

- you can't connect to any machine from inside the VM (DNS resolution works though)
- from the outside you can't connect to the machine (over SSH for example)

Disabling the "exit node" feature in Tailscale resolves the issue (although, quite often, I also have to restart the VM after I disable the exit node). I'm running the latest "standalone" Tailscale client (https://tailscale.com/kb/1065/macos-variants): 1.92.3. Also, the machine designated as "exit node" only has IPv4 connectivity, but even the IPv4 connectivity in the VM breaks (for example `curl -v -4 http://google.com`).

**Configuration**
* UTM Version: 474 (115)
* macOS Version: 26.2 (25C56)
* Mac Chip (Intel, M1, ...): 2.3 GHz 8-Core Intel Core i9

**Crash log**
(not a crash)

**Debug log**
(attached)

**Upload VM**
(I don't think it's specific to one VM)

[debug.log](https://github.com/user-attachments/files/24422254/debug.log)