Variables cannot be added to Templates using Chrome

Synposis: Working with Templates in Google Chrome Version 39.0.2171.95 m (latest) does not work with Adding Variables, unless the variable has been created in another browser. It appears to be an error in the call from reviewing the Google Web Developer output.

Reproduction: Using Confluence Standalone for Windows (reported on Windows) 5.6.3, 5.6.4 and 5.6.5 (latest) issue reproduces simply on Chrome version above as follows:

1. Install Confluence using PostgreSQL as the backend DB with Example Site
2. Create a new Space
3. Using Space Tools > Content Tools > Create New Template
4. In Template, attempt to add a variable (see examples shown from Firefox and Chrome
5. Variable adds as a 'New Variable' in Firefox, will not add as a 'New Variable' in Chrome
6. If Variable was created in another browser, it can be added in Chrome, only New Variables can not be added in Chrome

Workaround for the present: Use either Firefox, Internet Explorer or Safari for Windows which do work without issue, but Chrome will not allow creation of new variables in current release.

Information shown in logs:

2014-12-14 12:59:20,218 WARN [http-bio-8565-exec-5] [plugins.highlight.rest.SelectionModificationResource] getContext Could not find page with id : 819201, unable to set page in context
 -- referer: http://localhost:8565/c565/pages/templates2/editpagetemplate.action?entityId=819201&key=TES | url: /c565/rest/highlighting/1.0/panel-items | userName: admin
2014-12-14 13:02:47,674 WARN [http-bio-8565-exec-7] [plugins.highlight.rest.SelectionModificationResource] getContext Could not find page with id : 819201, unable to set page in context
 -- url: /c565/rest/highlighting/1.0/panel-items | userName: admin | referer: http://localhost:8565/c565/pages/templates2/editpagetemplate.action?entityId=819201&key=TES
2014-12-14 13:11:08,477 WARN [http-bio-8565-exec-3] [plugins.highlight.rest.SelectionModificationResource] getContext Could not find page with id : 819201, unable to set page in context
 -- referer: http://localhost:8565/c565/pages/templates2/editpagetemplate.action?entityId=819201&key=TES | url: /c565/rest/highlighting/1.0/panel-items | userName: admin 

More info: CSP-136815