Systemd / Init: Service provider inconsistently picked when querying or changing SysVinit services

In EL7 (and possibly other platforms), Puppet chooses different service providers when just querying a service and when actually changing it. Example:

[root@ebdj2qy9lc1axzg puppet]# bundle exec puppet resource service logstash --param provider

service { 'logstash':

  ensure   => 'stopped',

  enable   => 'true',

  provider => 'redhat',

}

[root@ebdj2qy9lc1axzg puppet]# bundle exec puppet resource service logstash enable=true --param provider

service { 'logstash':

  ensure   => 'stopped',

  enable   => 'true',

  provider => 'systemd',

}

Notice that Puppet switches to the systemd provider when altering the service, but uses the RedHat provider when simply querying it. Note that logstash as a sysvinit service with no unit file. The systemd provider is used consistently on regular systemd services with unit files.