OpenBSD 7.6 VM has no console output

**Describe the issue**

An OpenBSD 7.6 VM which worked perfectly on UTM 4.5.4 has a completely blank console window after upgrading to UTM 4.6.4. Other than that the VM works OK - I can ssh to it. Downgrading to 4.5.4 fixes the problem so it's not something that I accidentally broke in OpenBSD at the same time as I upgraded UTM. No other VMs running other OSes have this problem.

**Configuration**
* UTM Version: 4.6.4
* macOS Version: 15.3.2
* Mac Chip: Intel

**Crash log**

No crash

**Debug log**

[UTM-4.6.4-OpenBSD-7.6-debug.log](https://github.com/user-attachments/files/19555835/UTM-4.6.4-OpenBSD-7.6-debug.log)

**Upload VM**

[config.plist.zip](https://github.com/user-attachments/files/19555846/config.plist.zip)