I have found that select element have duplicate name attribute "field_perspec...

Contribution Date
Technology
Contribution Project
Contribution Details

I have found that select element have duplicate name attribute "field_perspective_category[]" so i convert one that have id "#edit-field-perspective-category-cloned" to "edit-field-perspective-category-cloned[]"

Attached patch file works for me with Improved Multi Select version 8.x-1.3

Contribution Author
Files count
2
Patches count
1