Why would Sub-tasks section of a parent issue's 'view issue' page get hidden during page load?

Question

When we are loading up a parent issue with subtasks we can see the subtasks for a split second then it goes away. This happens in internet explorer and chrome as well. Why can we not see the subtasks section in the parent issue?

I have looked in to the documentation below but could not see any way to hide/show this section.

https://confluence.atlassian.com/adminjiraserver072/configuring-sub-tasks-828788265.html

Below are our jira server configuration regarding this issue. Thanks in advance for any guidence/input.

jira.table.cols.subtasks = status,summary,progress,timespent,duedate,assignee,components,timeoriginalestimate,created,issuetype

Jira Software Server v7.2.7#72009-sha1:68b7d86

Google Chrome 59.0.3071.115 (64 bit)

Internet Explorer version 11.2007.10586.0

screenshot taken when subtasks show for a split second during page load... (this took couple tries to capture...)

screen shot taken after the page load completes...

Suha Akman · Answer

Thank you for the responses. Our Announcement Banner just has some shorcut links. I am adding the code below. We have recently been testing Confluence integration and R4J plugin. We will delete the application link to Confluence and disable R4J and see what happens...

LinkName... LinkName... LinkName... LinkName... LinkName...

Ignacio Pulgar · Answer

Indeed. My first thougt was about javascript being added to the announcement banner...

Ignacio Pulgar · Answer

That behaviour seems to be a bug.

You may open a ticket with Atlassian Support:

https://support.atlassian.com