Importing Folder with some objects fails to import all objects to Folder

Document ID : KB000084765
Last Modified Date : 14/04/2018
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Error Message :

Importing a Folder with some objects in it does not put all the objects into the Folder. Instead some objects stay in <No Folder>.  
OS Version: N/A
Cause type:
Root Cause: The XML import is not importing some Folder objects.
Update to a fix version listed below or a newer version if available.

Fix Status: Released

Fix Version(s):
Component(s) : AE Server and InitialData

Automation Engine 12.1.0 - Available
Automation Engine 12.0.4 - Available
Automation Engine 11.2.7 - Available
Additional Information:
Workaround :
Retry the import.

After the second or third try, the objects will be present in the correct folder.