Expected behavior When items checked on multiselect form, it is supposed to add "selected" attribute to the corresponding option tag, so that the selected values can be collected and passed.

Actual behavior Selecting any item, (one, two, all items), won't change the option tags. Thus, $('#id_for_multiselect').val() returns an empty array. Screenshot shows the select tag was initialized, and after checking some options, still the option tags are not "selected"

Note: when "multiple" attribute is removed (single-select), it works normally; .val() returns the value of selected option as expected.

Resources (screenshots, code snippets etc.)