Issue with kirby3-xmlsitemap and the excludefromxmlsitemap field

Hello there

For our multilanguage site I tried to hide pages (in some languages only) from the generated xmlsitemap (using kirby3-xmlsitemap plugin) by using the field excludefromxmlsitemap as shown in the documentation.
However I can’t make this work.

The pages have the following value in the content file:

----

Excludefromxmlsitemap: true

----

However, they still appear in the sitemap.xml.
Did someone have a similar issue or an idea what could be the issue?

I just noticed, that it works when i activate the excludefromxmlsitemap on the main language. Is it not possible to use this option just for one language?