Just wanted to give you a quick update. Product has identified the issue, and is now working on a fix. The issue is/was only affecting the display of the header; the properties were updating correctly, and list segmentation was functioning properly. I’ll post here again once a fix has been deployed.
Does this occur when updating an event that includes a variable (i.e. {{percent_watched}} ) in the header? If so, this is a known issue that product is working on. I’ll updated here when I have more information.