I've verified the mechanisms for copying and pasting components in the page editor. I can't copy a component on one page, then paste it on a duplicate of the same page. It seems, actually, that I can't c&p of components to work across pages in general.

Steps to reproduce

1. In the Travel demo, duplicate the page /travel/about/company. This leads to the creation of the page /travel/about/company0.
2. Copy the text/image component on the /travel/about/company.
3. Open the page /travel/about/company0 (the duplicate), and try to paste the copied text/image component into the "Main" area.

The "paste component(s)" action is not enabled, but I actually expect it to.

Note that copy+paste of components within the same page, but different areas works fine.