Eerie problem with extra content stacks

When I insert an extra content stack into my page, everything appears normal. When I drag a content stack into it (text, columns, image, whatever) the EC stack header vanishes and I can’t change the EC stack position in the theme.

lindan,

Which Theme?

Which EC Stack?

It happens with all themes. The blue EC stack element.

[EC]i

Extra Content can be controlled by such a Stack as this one. Have you tried that?

I confess, I’m not exactly sure what is happening with you - and I’m sorry. But it shouldn’t be.

Which version of RW?

Would you mind talking us through the exact steps to reproduce the phenomenon, Lindan, please?