WPGlobus with Custom Post Type UI in Gutenberg

It seems to be a Problem to change the content in already existing Custom Post Type UI plugin posts wich have two languages by WPGlobus.
The existing custom post ist appearing as a “classic” block in Gutenberg, but there is no option to change the language on top of the page and both languages are shown one after the other in the block with a language-prefix like:
{:de}
{:}{:en}

When writing a new post in a Custom Post Type everything works fine with the language-switch button like in normal WP posts or sites

I did ask the support of the CPT-UI plugin too, but he thinks that this case is maybe up to you?

Thank you!

WPGlobus Version: 2.0.1 / CPT-UI Version: 1.6.1 (newest)

The page I need help with: [log in to see the link]