Author Description Dynamic Content not showing up

Hey there,
while customzing the blog content I've came across the dynamic author description option. I've added a new block to the existing post and added the dynamic content + author description option. The author description is also filled for the user, but somehow it's not showing up. I've tried in a incognito tab, clearing the cache but nothing seems to help.

Here is an example site:
https://waren-vergleichen.de/kinder/die-besten-smart-watches-fuer-kinder/