JIRA Issues Macro count is showing incorrect value

Overview

The Issue Link is not updated when the one of the original macros were removed from the page and throwing some error message on the Confluence UI

Steps to Reproduce

• Create a Blank Page from a brand new Confluence installation
  

• Insert two JIRA Issues Macro as per the following screen shot
  

• Confirm on the amount of JIRA links (In this case 2 links)
  

• After that, we edited the page and removed one of links. After saving the page, the links were still showing 2 links and after clicking the links button, we get the following error on the UI (and the links is showing 0 JIRA Links)
  

• After refreshing the page, it will show the wrong Issue Link count again (2 Issue Link) in this example
  

Checking from the atlassian-confluence.log, we can see the following exception below:

2014-05-24 20:30:17,059 WARN [http-bio-8551-exec-6] [metadata.jira.helper.JiraMetadataErrorHelper] printError One or more JIRA instances could not be reached.
 -- url: /conf_551/rest/jira-metadata/1.0/metadata | userName: admin | referer: http://localhost:8551/conf_551/display/ds/JIRA+Issues+Macro+Testing
java.util.concurrent.CancellationException
	at java.util.concurrent.FutureTask$Sync.innerGet(FutureTask.java:220)
	at java.util.concurrent.FutureTask.get(FutureTask.java:83)
	at com.atlassian.confluence.plugins.metadata.jira.service.helper.FutureMetadataHelper.processFutures(FutureMetadataHelper.java:58)
	at com.atlassian.confluence.plugins.metadata.jira.service.helper.FutureMetadataHelper.process(FutureMetadataHelper.java:42)
	at com.atlassian.confluence.plugins.metadata.jira.service.JiraMetadataService.getMetadata(JiraMetadataService.java:99)
	at com.atlassian.confluence.plugins.metadata.jira.rest.JiraMetadataResource.getMetadata(JiraMetadataResource.java:25)
...

Expected Behaviour

The Issue Link count should reflect the updated amount of JIRA Issues Macro link after the page is updated (when any JIRA Issues Macro is / are removed)

Environment

JIRA 6.2.5 + Confluence 5.5.1 + JIRA Agile 6.3.13.1