I may be missing something but the first time I try and edit an array. I get the array values less the [, ], & "s. I.e. just a simple comer separated string :(

If I put them back future edits are ok. Also if my Puppet modules have a blank array [] when I go to edit I lose the [] then I can edit I have to add the [, ] , & " but at least the values are good after that.

If I cancel the edit I get the [] back.

This can be tested with the NTP module.
See also https://groups.google.com/forum/#!topic/foreman-users/C8UalPWWckY