[Bug Report][2.6.0-beta.0] v-select divider is selected when using keyboard up/down

[pumpknhd]

Environment

Vuetify Version: 2.6.0-beta.0
Vue Version: 2.6.12
Browsers: Chrome 95.0.4638.69
OS: Windows 10

Steps to reproduce

1. Click on a v-select
2. Select any item. This will close the v-select
3. Use arrow key to go up or down

Expected Behavior

It should go from one item to the next, skipping the divider

Actual Behavior

It's selecting the divider with [object Object].

Reproduction Link

https://codepen.io/pumpknhd/pen/XWaVVLZ

[KaelWD]

Caused by #12815