This incident has been resolved.

A fix has been implemented and we are monitoring the results. Email content is now rendering as expected.

This issue affected emails sent between approximately 1:30pm US Eastern Time and 3:30pm US Eastern Time. During this period, any emails that were sent may have suffered from incorrect template rendering in users' email clients.

We have identified an issue editing content within the Email Template Editor. This issue is causing template previews to render email content inaccurately, which means that previews may not resemble emails as they appear in users' email clients. We are working on fix to this issue, and expect this fix to be released in approximately 1 hour. We will provide updates here as we work towards a resolution.