Entered tag deleted on second entry

[dfilipidisz]

Steps to reproduce:

1. Type in a tags, for example apple
2. Hit enter -> new tag is created OK
3. Type second tag, in this case the same thing: apple
4. Hit enter -> both tags are removed from the select.

I would expect to have 1 apple tag at the end, but instead both tags are removed.

You can reproduce the problem on the demo site: https://select-react-component.vercel.app/demo/tags