[Closed] Line breaks removed/ignored in Advanced Translation Editor

Background of the issue:
Me and my client are trying to translate posts using WPML (version 4.6.13). We noticed that line breaks are ignored in the Advanced Translation Editor. The option 'I prefer larger segments' does not help, and we cannot manually add line breaks with SHIFT+ENTER or any other method. Switching back to the old editor is also not a solution. The original post looks fine outside the editor, but inside the editor, both the German (original) and English (second language) textareas do not show line breaks. All text appears as one big paragraph. Additionally, I cannot use ALT+0, ALT+2, etc., with these texts. The issue can be seen at hidden link.

Symptoms:
Line breaks are ignored in the Advanced Translation Editor. The text appears as one big paragraph without line breaks. Manual line breaks with SHIFT+ENTER do not work. ALT+0, ALT+2, etc., cannot be used with these texts.

Questions:
Why are line breaks ignored in the Advanced Translation Editor?
How can I manually add line breaks in the Advanced Translation Editor?
Why does the option 'I prefer larger segments' not bring back the line breaks?
Why can't I use ALT+0, ALT+2, etc., with these texts?