mailalias always performs a "change" when value has a comma

I'm using puppet 2.7 and on one node, I have a mailalias resource to
setup something for redmine like the following:

    mailalias {

        "redmine":

            recipient =>

'|/usr/share/redmine/extra/mail_handler/sub-mailhandler.py -e

redmine@redmine.example.com -- /usr/share/redmine/extra/mail_handler/rdm-mailhandler.rb --url https://redmine.example.com --key somerandomalphanumstring --no-check-certificate --unknown-user accept --no-permission-check --allow-override project,tracker,category,priority,status';

    }

puppet is always refreshing the alias for no reason. changing the value
to the same thing.

after doing some more testing, I found out that mailalias bugs in the above manner as soon as there is a comma in the recipient parameter value (e.g. with "...project" it's ok but with "...project," I start seeing the issue).