How to select the same input more than once [selectize.js]?

Question

I am creating a brilliant application and will be very grateful to selectize.js. I have been everywhere on the Internet and cannot find a way to keep the original list of options intact after selecting it.

I have a selectizeInput panel with multiple = TRUE , I want to be able to select the same element twice and have an array of ["First", "First"]. He seems to have no choice. Each time I select an item, it cannot be selected again.

Any ideas?