Vuetify: [Bug Report] Initial selection is not loaded in Treeview

[Toilal]

Environment

Vuetify Version: 2.0.9
Vue Version: 2.6.10
Browsers: Chrome 76.0.3809.100
OS: Windows 10

Steps to reproduce

• Open the codepen

Expected Behavior

Item "One" should be selected in the UI, as it's available in data.

Actual Behavior

Item "One" is not selected in the UI.

Reproduction Link

https://codepen.io/Toilal/pen/vYBgaeB

Other comments

If something change the selection after it's creation, everything is working properly.

[Toilal]

My current workaround

  mounted () {
    const selection = clone(this.selection)
    this.selection = selection
  }