[Bug Report][3.0.0-beta.5] Combobox v-model data binding does not work like expected

[anne-schwarz-osp]

Environment

Vuetify Version: 3.0.0-beta.5
Vue Version: 3.2.36
Browsers: Chrome 103.0.0.0
OS: Windows 10

Issue 1: v-combobox content/string gets cleared when combobox is clicked

Steps to reproduce

1. Click into the v-combobox
2. Enter some chars

Expected Behavior

• The predefined string is visible inside the v-combobox
• The textcursor is at the end of the string
• Entering chars extends the string

Actual Behavior

• The combobox seems to be empty
• Entering chars overwrites the whole predefined string

Issue 2: reseting v-model data does not work for combobox

Steps to reproduce

1. Click at the appended close icon to delete the string
2. Click into the v-combobox
3. Enter some chars

Expected Behavior

• The combobox is empty
• I can enter a new string
• Only the new string is stored in the v-model variable

Actual Behavior

• The value entered before resetting it is displayed again
• Entering chars extends the string

Reproduction Link

https://codepen.io/anne-schwarz-osp/pen/mdxEKmy?editors=1010

Other comments

I assumed that the combo box behaves like a v-text-field but with bonus functionality. The text field itself works pretty fine and I can reset the value passed to it. But for the combo box the connection to v-model seems to not work correctly.