Coreui pro multiselect issue

I am trying to implement the new multiselect released in the last pro update but I am running into an issue where “undefined” is showing in the select for each option instead of the actual data from the select. It looks like the demo has the same issue for bootstrap version in the 2nd card section

Hi, do you use Firefox?

Hi, yes I use firefox. It is also not working in IE but I see it is working in Chrome.