ID 343776 - Email generated from publishing shows the OS username instead of the Username entered to log in to Flix

Problem summary
Email publish reports show different user

Customer reported version
5.3v3
Customer reported platform
10.12

Steps to reproduce

1) Create a couple of panels and Publish the sequence.

2) Check the Flix Publishing Email

Reproduced by support
Reproduced in 5.2v5 and 5.3v3

Earliest version tested
5.2v5

Expected behaviour
"Published By" should display the logged in flix user

Actual behaviour
Published By displays the OS Username