A very simple solution is to open the file select2.min.js in an editor and search for the phrase ( function(){var a={"Ⓐ":"A","Ａ":"A" ) The task of this function is to map characters. Add the problematic cases to the beginning of this function, for example:

function(){var a={"ك":"ک" , "ي":"ی" , "Ⓐ":"A","Ａ":"A" ............

Best regards.