ID 466127 - Photoshop: 2.39 template has a white space area that's too small in height by 1 pixel

Problem summary
The 2.39 template Flix provides PS with has white space which is 1 pixel too small.

Customer reported version
Flix 6.3.6

Steps to reproduce

1) Make sure the Flix-PS plugin is installed, open Photoshop, set the plugin aspect ratio to 2.39, and click on New Template from the plugin actions.

2) Select the square selection tool, and at the top where it says Style choose to select with a fixed ratio of 2.39 width to 1 height. 
 

Next select the entire white area of the template. You will notice there is a one pixel row of the letterboxing which needs to be included for the ratio to be correct.

3) Send this blank template to Flix using Current Image, and once the panel is in Flix export the thumbnail for it (Image option from the Export popup). Open the thumbnail in PS, and zoom in until you see a one pixel row of grey from the letterboxing.

Expected behaviour
The white area in the PS template should be consistent with the rounding used to create the 2.39 thumbnail with 1000 length.

Actual behaviour
The white area in the PS template is not representative of the 2.39 aspect ratio.

Reproduced by support

This bug has been reproduced in:
6.3.6 - macOS 10.14 Client - CentOS 7 Server

6.3.4 - macOS 10.14 Client - CentOS 7 Server

6.1.2 - macOS 10.14 Client - CentOS 7 Server

Earliest version tested
6.1.2 - This issue appears to be in all versions of the product