[Gelöst] Cannot translate reusable block

Background of the issue:
I am trying to translate a reusable block on my site versteckter Link using WPML. The translation for Slovak disappeared, and the admin area only shows the post in Czech and English and when I try to add it, it's not saved.

(P.S. I wrote the issue already and this rewriting function makes me nuts)

Symptoms:
When I try to add Slovak for one special reusable block, it doesn't seem to work. versteckter Link

Questions:
How can I fix it?