file-copier recursive file copy not possible

[pts-aut]

I've defined a Job-Step to copy all directories an files in a specific path on the rundeck server.
Parameter Recursive: true and Pattern is null.
In the Rundeck-part of the call the CopyFileNodeStepPlugin.java is called correct - and after the output of the line:
Begin copy 4096 bytes to node xxxxxxx: /home/rundeck/scripts/windows -> c:/temp/xxx/96257/
the call is forwarded to file-copier:overthere-winrm.
Then the following error occurs:

failed: /home/rundeck/automatics/scripts/windows (Is a directory)
Failed: CopyFileFailed: com.dtolabs.rundeck.core.execution.service.FileCopierException: /home/rundeck/automatics/scripts/windows (Is a directory)

The same setting for Linux (with scp) is working without any error:

Begin copy 4096 bytes to node xxxxxxx: /home/rundeck/scripts/linux -> /tmp/xxx/96277/
Copied: /tmp/xxx/96277/

I think the Implementation in the file-copier of overthere-winrm does not handle recursive-copy for directories correctly.

Job-Configuration:
- configuration:
destinationPath: ${node.file-copy-destination-dir}/${job.execid}/
echo: 'true'
recursive: 'true'
sourcePath: /home/rundeck/scripts/windows/
nodeStep: true
type: copyfile

Node Configuration:
"hostname": "xxxxxxx",
"osName": "Windows",
"osVersion": null,
"osFamily": "Windows",
"node-executor": "overthere-winrm",
"file-copier": "overthere-winrm",
"file-copy-destination-dir": "c:/temp/xxx",
"winrm-protocol": "http",
"winrm-port": 5985,
"winrm-cmd": "powershell",
"winrm-auth-type": "ntlm",
"winrm-password-storage-path": "keys/winrm/xxx.password"