Blank document in 2013 Workflow

[Steve_hendy]

I am able to create a document in a library using a 2013 workflow. All the metadata is created correctly. I have chosen the correct content type but the created document is empty. If I do new in the library the document created is perfect and uses the content type template perfectly. Why is the workflow not picking up the content type template?
The site is SharePoint 365.

[#2]

I have this working fine in a 2010 workflow but Microsoft are switching 2010 workflows off at the end of the month.

[#3]

Does Microsoft offer help for their products?