Hi,
After upgrade to ED 4 I have found several Javascript problems, after some research I have found a new parameter enabled by default called "Load jQuery (Recommended to leave it on)". After disable this all seems to works.
Why ED load own jQuery instance? I think is better to use JUI jQuery (load with Joomla API) to keep compatibility with all Joomla components and templates, Joomla default components and all templates already load this.
Can you confirm that all ED javascript will works with default Joomla jQuery?