I have just noticed that if the 'glossary auto-linking' filter is enabled, and some of the text appearing in the draggable items is a word in the glossary, this then displays the full HTML code to the user which makes no sense. I haven't tested it, but I wouldn't be surprised if something similar happens with the 'activity names auto-linking' filter.
Can you make the necessary tweaks so that either these filters are picked up and correctly rendered in the draggable items, or do something that stops these filters from working at all within the draggable items.
Thanks