Select2 truncated Chinese characters

Question

I am using select2 for select form in the Rails app. In select form, select2 generated an input field with class name is "select2-search__field". When I input Latin characters into it, it is normal, but if I input the Chinese characters, the search text will be truncated. Example: I type 老师您好, the search will be 老师您. How can I solve this problem. Please help me any suggestion you have.