Vuetify: [Bug Report] If Combobox loses focus with the input string matching an existing term, the saved value is removed.

[jsdbroughton]

Environment

Vuetify Version: 2.3.6
Vue Version: 2.6.2
Browsers: Chrome 85.0.4183.121
OS: Mac OS 10.15.7

Steps to reproduce

Add a Tag to multi combobox.
Blur the combobox.
Start typing the same Tag in the combobox input field.
Blur the combobox.

Expected Behavior

Input string clears. Previously entered tag remains.

Actual Behavior

Input string clears. Previously entered tag is removed from the values.

Reproduction Link

https://codepen.io/stardotbmp/pen/YzqmByN?editable=true&editors=101%3Dhttps%3A%2F%2Fvuetifyjs.com%2F

Other comments

With some versions of the combobox props, this behaviour also occurs if the field is cleared with the Escape key.

Some combinations of props/slots exhibit the behaviour where a duplicate tag is added will result in no tag being added and some where the duplicate existing tag is removed. Seems related.

[Dan-Correia]

Hi @jsdbroughton, I was looking at the source code for the combobox, and the intention seems clear. It's not meant to allow duplicated values.

I went to look for the documentation and the description of the Combobox and here's the description:

This is therefore a feature request, not a bug report.

[jsdbroughton]

That intention is indeed clear. The fact a user may be 'punished' under certain circumstances for entering a duplicate value by having both removed seems buggy more than a feature to be removed.