Context: testing the drag & drop with the new form layout (https://github.com/jenkinsci/jenkins/pull/3895)
I have found that the freestyle job configuration of the dockerhub-notification-plugin (https://github.com/jenkinsci/dockerhub-notification-plugin) is not working correctly with the new form changes.
It redefines several Jenkins Core widgets such as f:optionalBlock and f:expandableTextbox, and they stop working.
Submitting the form does not save the configuration.
Wrong behaviour: dockerhubnotification-post.mov