We noticed a problem with app embed deep linking this morning.
When using the app embed deep link to install our app embed to a theme the routing appears to fail and reverts to app settings in the theme editor.
The deep link technically works, but since I get reverted to app settings it’s causing a MX issue. Having to navigate back to app embeds will inevitably cause confusion for our merchants.
Anyone else experience this?
Same here, spent the last two hours on that 
The App embed block deep linking URL described here:
is not working anymore.
I noticed it is not selecting the Apps embed (context=apps) when you open the url generated to activate the app embed with
https:///admin/themes/current/editor?context=apps&template=${template}&activateAppId={api_key}/{handle}
But when I click it manually, the location.href is populated correctly.
We are facing the same issue.
I have a similar problem with admin-links, the right app (iframe) loads, but then is redirected to the main app (iframe) page.
Hey folks,
This should have been fixed ~2 weeks ago - let me know if anyone is still experiencing this.