File resource doesn't seem to parse UTF8 filenames when recursively copying directories

Puppet Version: 5.5.1 (Win x64)
Puppet Server Version: N/A
OS Name/Version: Windows 10 - 1803

Desired Behavior:

Given a manifest saved as UTF8

file { "c:\\install\\test\\Testing-wordsé":

  ensure  => file,

  content => 'Testing é',

} ->

file { "c:\\install\\test\\Testing-words-copyé":

  ensure => file,

  source => "c:\\install\\test\\Testing-wordsé",

} ->

file { "c:\\install\\test2":

  ensure  => directory,

  source  => "c:\\install\\test",

    recurse => remote,

    replace => true,

}

It should create the files in the C:\install\test directory
It should copy the C:\install\test directory to C:\install\test2

Actual Behavior:

Puppet apply errors with;

Could not set 'file' on ensure: invalid byte sequence in UTF-8

Full trace dump in comments