Creating a child of type cm:folder with autoRename on true into a record category/unfiled container with the same name as existing one doesn't work

Steps to reproduce:
1.Create a root category within the fileplan.
2.Create a child of type cm:folder into the record category created via the RestApi

http://localhost:8080/alfresco/api/-default-/public/gs/versions/1/record-categories/3cc33f34-a1f1-4cb9-916f-ae880b746563/children

nodeBodyCreate 
 {
    "name":"My Record Folder 1",
    "nodeType":"cm:folder"
  }

3.Sent the same api request with the autoRename parameter on true

 
http://localhost:8080/alfresco/api/-default-/public/gs/versions/1/record-categories/3cc33f34-a1f1-4cb9-916f-ae880b746563/children?autoRename=true
nodeBodyCreate 
 {
    "name":"My Record Folder 1",
    "nodeType":"cm:folder"
  }

Actual result:
Thre record folder is not created, the response received is:

  "statusCode": 409,
    "briefSummary": "04120131 File or folder My Record Folder 1 already exists",

Expected result:
The record folder should be created having a unique name by adding to the name sent a integer suffix.

Info:
When the type sent is rma:recordFolder or rma:recordCategory the issue is not reproducing.
We convert the cm:folder type into a record folder when we create it inside a record category