Rich text action not allowing overlay / slide in

Hi there

I am wanting to link an action to rich text that makes an overlay (pop up) appear with the details page. However, when I select overlay (or slide in) it doesn’t do this, instead the details page shows as the main page (navigating away from my original page). I’m guessing this is a bug as it should be able to show as an overlay?

Help appreciated, thanks!

Can you show us how you’re setting up the action?