puppet agent cannot find ldap group

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I am currently running PE 3.1 (Puppet 3.3.1) and my puppet agent can't see the existence of an LDAP group when run.

Resource:

file { '/tmp/file':
      ensure  => file,
      group   => 'examplegroup',
}

Output:

puppet-agent[25727]: (/File[/tmp/file]) Could not evaluate: Could not find group examplegroup

However that group does indeed exist:

$ getent group examplegroup
examplegroup:*:10008:

Even more peculiar, when I trigger a run manually ( by running puppet agent -t) it has no problem modifying the file's group. I suspect do so some ENV variation between puppet running as an agent and puppet running manually triggered ... (more)