onChange event runs twice in Firefox

[stojanvujkov]

Trying to "clear" select field after an option is selected, by selecting another option right after it (with empty value in this case), results in onChange event running twice in Firefox (only). Same with selecting any option not just empty one. It works as expected in Chrome, Edge & Safari, where it runs only once. Version 0.15.2

$(document).ready(function()
{
    var $select = $('#client').selectize({
        create: false,
        sortField: 'text',
        preload: true,
        openOnFocus: true,
        valueField: 'id',
        labelField: 'text',
        allowEmptyOption: true,
        showEmptyOptionInDropdow: true,
        onChange: function(id) {
            // this runs twice in Firefox
            console.log('Selectize value changed to: ' + id);
            $select[0].selectize.setValue('', true); // select another option
        },
    });
    var selectize = $select[0].selectize;
});