[Inkscape-user] weird behavior Text along path group copy ungroup

Open this code in inkscape (a text along a circular path).

Group it all

Copy

paste Ungroupe : the text is no longer along the path. What's wrong with that code (progeamgenerated) ?

Thanks

<svg viewBox="0 0 500 500" xmlns="http://www.w3.org/2000/svg"> <circle cx="250.0" cy="250.0"  r="119.04761904761904" fill="none" stroke="red" id="sphereceleste"  stroke-width="0.5" /> <text    font-family="Arial, Helvetica, sans-serif" font-size="7" > <textPath xlink:href="#sphereceleste" startOffset="20%">equateur</textPath> </text></svg>