I have an exb app using two embedded dashboards. All apps are in the same AGOL organisation/portal and are shared to the same user groups.
Prior to the June update users signed into exb could view the dashboards without needing to sign in twice - the embed widgets were configured to successfully share authentication from exb using:
https://www.arcgis.com/apps/dashboards/<appID>?arcgis-auth-origin=https://experience.arcgis.com&arcgis-auth-portal=https://<myorg>.maps.arcgis.com
Post update the embed widgets are displaying as blank.
Taking a look at the help page I noticed that I had missed '/index.html#/' from the url. Adding this to the url after 'dashboards/' causes the embed widget to load the dashboards but users now have to login each time the embed widget is loaded in a new browser instance (after first logging into exb).
Just seeing if this is a) expected, b) I'm missing something or c) if anyone else is experiencing the same behavior before I go through support.
