So i have been cleaning up our Jira board and removing watchers from Closed items, but for some reason a few Jira issues do not fully delete all watchers. I have a Filter App on my dashboard looking for Closed items that still have watchers and even though i deleted all watchers a couple of these Jira issues still show up in my filter.
Example:


When i extract the Jira issue as a XML file it shows:

Even though the issue itself is showing 0 watchers as seen in the first picture
How can i solve this problem?
Thanks in advance!