I'm using ArcGIS Enterprise 10.9
I want to embed content into a popup.
When I edit the popup and add an iframe, it seems to get removed immediately -- when I switch back to the preview mode and then to HTML mode, it's just gone.
When I use the embed tag, it works, but when I save the map and reload it, it's gone. It's being deleted before it's saved to the map configuration file.
Do other people see this? Is it a "feature" that's undocumented? Can I disable the feature?
Here are some screen captures. Here is editing the popup in HTML mode
switch to preview mode and you can see the embed content is there. Scrolling down reveals there is no iframe content.
switch back to html and note the iframe is now gone
now if I save the map and reload the page, it has removed the embed tags too,