Cannot mark a page as deleted on a subwiki when XWiki is deployed in the ROOT context

When XWiki is installed as the ROOT application (without the /xwiki/ particle in the URL), the "mark as deleted" menu in a page's "Versions" menu points to:

https://<domain name>//wiki/<subwiki name>/view/BookVersions/Code/SwitchDeletedMark?[...]

with the double slash between the domain name and the /wiki/ particle.

For the subwiki, this double slash is not processed properly by XWiki and the resource corresponding to the URL is not found.

Surprinsingly, on the main wiki the corresponding URL with double slashes

<domain name>//bin/view/BookVersions/Code/SwitchDeletedMark?[...]

works fine, but this is just a chance, this URL should not contain 2 slashes.