Tahoe 26.4 guest on Sonoma host: hangs and missing icons

**Describe the issue**

I updated a Sequoia guest VM to Tahoe via Software Update. I am encountering frequent hangs and I'm seeing several missing icons.

I believe this to be related to `iconservicesagent` crashing. There are several messages in console:

```
Subsystem: com.apple.iconservices
Category: default

Unknown device class: 9
```

Is UTM setting the device class to 9? Is this Virtualization.framework? I have tried to reinstall Tahoe multiple times as well as Erase Contents and Settings on the VM to no effect.

**Configuration**
* UTM Version: 4.7.5
* macOS Version: 14.7.8
* Mac Chip (Intel, M1, ...): M2 Ultra

**Upload VM**

[config.plist.zip](https://github.com/user-attachments/files/26324855/config.plist.zip)

[iconservicesagent-2026-03-28-095017.ips.zip](https://github.com/user-attachments/files/26324863/iconservicesagent-2026-03-28-095017.ips.zip)