Embed Snapshot with Short URL, ?embed=true not working to remove header and nav drawer

[MarnieGordon]

Kibana version:7.4.0

Elasticsearch version: 7.4.0

Server OS version: Windows

Browser version: all current (IE/Chrome/Firefox)

Browser OS version: all current

Original install method (e.g. download page, yum, from source, etc.):download page

Describe the bug:Embed Snapshot with Short URL, ?embed=true not working to remove header and nav drawer

Steps to reproduce:

1. Create dashboard
2. Share => Embed Code => Snapshot => Short URL
3. Embed iframe in .net application or navigate to referenced URL in a different browser
4. Kibana displays dashboard with full header and nav drawer, not removed

Expected behavior:
In previous version (recent upgrade from 5.5.2 and 6.3.2), the embed=true removes header and nav drawer, as it still does when using the Embed Code => Saved object method.

Screenshots (if relevant):

Errors in browser console (if relevant):

Provide logs and/or server output (if relevant):

Any additional context:

[elasticmachine]

Pinging @elastic/kibana-app (Team:KibanaApp)

[tylersmalley]

Also raised here: https://discuss.elastic.co/t/share-snapshot-embed-code-not-removing-menus/206866

[majagrubic]

Looks like when transforming the short URL to a regular URL the embed=true is lost and that's why the config is not preserved.

[flash1293]

I just tested this with an upgrade from 6.8 to 7.12 and it didn't work for me (at least for custom spaces)

The url looks like this:
http://localhost:5605/s/asd/goto/36d6831001a74d5db7f830d0cdfe3fc3?embed=true

And it seems like somehow in the URL migration process the embed flag gets lost and the URL renders with chrome

[kmartastic]

@clintandrewhall perhaps a quick win for @ThomThomson? LOE:needs research.

[elasticmachine]

Pinging @elastic/kibana-presentation (Team:Presentation)

[Hrithik-Manchanda]

Same issue faced after upgrade from 7.17 version to 8.5 version

[ThomThomson]

Closing this for the time being. It will be tracked in our Icebox for Iframe / Embedding issues and will be re-opened if our priorities change.