The images on my customer notification template don't show and always show a 'broken image' icon. When i inspect the email HTML with Google Chrome i can see that the URL is not being changed to the new one for some reason.
Here's the source url in the template:

And this is what customers get:

The strange part is that all other parts of html do get updated as soon i make changes to the template, except for the URL part. This stays the same as the old one (that doesn't work anymore.).
Old URL /Jira/DA_Mail.png
New URL /Atlassian/Jira_Signature.png