tags text does not appear in the dropdown in case of custom option template and multiple set to true

[Ali Haider Nadeem]

@shentao Tag text does not appear in the dropdown, only appears in the input field after I press enter or click on the tag (which was supposed to appear in the input field). I have set multiple to true. This issue only pops up when I use the "custom option template"

Reproduction Link: https://jsfiddle.net/cpxzfn17/9/

Steps to reproduce: just remove the custom option template and the tag text will appear. Soon as you add the custom template, the tag can be selected but does not show up realtime in the dropdown.

Expected behaviour: the tag text should be there all the time.

Actual behaviour: the tag text is not there.