AppCenter has trouble displaying window

### What Happened?


### Steps to Reproduce

1. Open AppCenter (`G_MESSAGES_DEBUG=all io.elementary.appcenter`)
2. Observe window rendering issues

### Expected Behavior

AppCenter window is visible.

### OS Version

8.x (Circe)

### Session Type

Classic Session (X11, This is the default)

### Software Version

Latest release (I have run all updates)

### Log Output

```shell
(process:22599): GLib-GIO-DEBUG: 20:36:50.716: _g_io_module_get_default: Found default implementation dconf (DConfSettingsBackend) for ?gsettings-backend?
(process:22599): dconf-DEBUG: 20:36:50.716: watch_fast: "/io/elementary/appcenter/settings/" (establishing: 0, active: 0)
(io.elementary.appcenter:22599): GLib-GIO-DEBUG: 20:36:50.718: Using cross-namespace EXTERNAL authentication (this will deadlock if server is GDBus < 2.73.3)
(io.elementary.appcenter:22599): dconf-DEBUG: 20:36:50.720: watch_established: "/io/elementary/appcenter/settings/" (establishing: 1)
(io.elementary.appcenter:22599): dconf-DEBUG: 20:36:50.722: sync
```

### Hardware Info

_No response_