I'm also experiencing the same bug. Hope it gets fixed.
Thanks Kamil for the effort on sharing his solution but it didn't
work completely for me. One item can still be duplicated but after
one, you can't duplicate an item anymore.
i also faced similar issue, thanks kamil , duplication bug
fixed. but i want to show same type in edit form.. whatever i added
before should show in this new text box and also i can add extra
participants and delete ..can you pls help me
hai..kapil. i also faced similar issue, now the problem is
solved, i want to display same thing while editing , i can able to
add new participant or delete previously added participant . can
you pls help me