Chat tool sends messages twice to rasa


I am using livezilla to converse with rasa at the front end. Sometimes the same message is being sent twice to rasa and rasa is responding back with the same action twice. How to deal with problem? I am kind of new to this domain. Can anyone share their thoughts regarding this?

livezilla integration link: LiveZilla Chat Bot API

The issue is resolved. I changed livezilla to an older version.