Ahh - That’s the issue then. At present, circular array, grid array, copy along path, copy/paste, and duplicate won’t work with text applied to a path. The pending release fixes copy/paste and duplicate, but I’m still working on the other three.
The issue is that the text needs the path attached to it. When copying text on a path, the path will also be copied, and the text associated with the new copy.
If you want to do this, the simple way is to select the text and choose Edit > Convert to Path. Then it’s just shapes, not editable text, and you can copy / rotate / duplicate it as much as you like. The results won’t be editable as text, but you don’t need to keep the text paths around any more either.