i18n, rss and sitemap.xml - no parent slug in links.

[Thomas Helzle]

I get the exact same problem here:

<url>
<loc>https://www.screendream.de/generation/?lang=de</loc>
<lastmod>2016-08-09T19:31:14+00:00</lastmod>
<changefreq>weekly</changefreq>
<priority>1.0</priority>
</url>
<url>
<loc>
https://www.screendream.de/sound/generation/?lang=en
</loc>
<lastmod>2016-08-07T17:46:26+00:00</lastmod>
<changefreq>weekly</changefreq>
<priority>1.0</priority>
</url>

Where the main language (en) shows parents in the GS created sitemap, but the second language (de) doesn't.
This confuses Google since there are suddenly different paths to the same page.
I use the latest version of i18n and tried above suggestions to no avail. Any recommendations?

Thanks and Cheers,

Tom