[Gelöst] Auto register strings for translations Error

Background of the issue:
I recently translated some texts that were not available using the "auto register strings for translations" method. I had no problems until today. Now, when "auto register strings for translations" is turned off, the Slovenian translations I translated with this method are turned into English. When I activate it, it is back to Slovenian. Although I have translated the other 4 languages this way, this problem only occurs in Slovenian. Link to a page where the issue can be seen: versteckter Link

Symptoms:
When "auto register strings for translations" is turned off, the Slovenian translations revert to English. When it is activated, the translations are back to Slovenian. This issue only occurs with Slovenian translations.

Questions:
Why do the Slovenian translations revert to English when "auto register strings for translations" is turned off?
Why does this issue only occur with Slovenian translations and not with the other 4 languages?