In Calc, how can I duplicate a row below, retaining cell merges?

E.g. I have this:

and I want this:

I tried Insert Rows Below, but that doesn’t carry the current row’s merges.

There’s Cut, Insert Rows Above, Paste - but as expected that messes up references.

I find no way to copy and paste parts of merges.

Starting from selected 3rd row:

  • ⇒Insert Row above
  • c4 ⇒ ctrl+x
  • c3 ⇒ ctrl+v
    done

Thanks. That works, except on the first row:

image