[Bug Report][3.7.6] v-treeview Default Selected Item Not Working with return-object

[eguvenc]

Environment

Vuetify Version: 3.7.6
Vue Version: 3.5.13
Browsers: Chrome 131.0.0.0
OS: Windows 10

Steps to reproduce

1- Create a v-treeview component with the following props:
v-model:selected bound to a default selected value.
return-object set to true.
item-value and item-title properties configured.
2- Populate the items prop with nested items.
3-Set a default value in v-model:selected that matches one of the items in the items array.
4-Render the component.

Expected Behavior

The v-treeview should render with the default selected item highlighted, matching the value in v-model:selected.

Actual Behavior

The v-treeview does not show the default selected item as selected. Instead, the v-model:selected value appears to be ignored or improperly processed when return-object is true.

Reproduction Link

https://play.vuetifyjs.com/#...