The "Event creation" page is not displayed entirely in German.

Hello,

I have an error with Helix-Ultimate on the Create Event page

the following:
On the "Create an event" page, the calendar pop-up is not fully translated into German. Here is a picture of it:

I have already found the cause when I assign a different template to the "Create event" page to test it. E.g. standard Joomla template the calendar is displayed completely in German.

Helix appears to be causing issues on the Create Event page! Even if I translate some of the English language file into German for the test, the calendar is still partly displayed in English.

How can I fix errors? Without changing the template right away?
Or is the problem known and will be fixed with the next update?

Please help

Thanks

Best regards
Jens