When attempting to clone++ or clone+ an issue with this plugin I get an error that the issues watchers custom field is a problem and will not be copied. I have contacted Bob Swift and they can't figure it out. They asked that I contact you.
Atlassian JIRA Project Management Software (v7.1.6#71010-sha1:428b2b3)
CentOS release 6.7 (Final)
[root@fsl-jira7 ~]# java -version
java version "1.7.0_79"
OpenJDK Runtime Environment (rhel-184.108.40.206.el6-x86_64 u79-b14)
OpenJDK 64-Bit Server VM (build 24.79-b02, mixed mode)