Double summary output in default language

What field widget are you using?

Can you post the HTML for that image?

<div class="vote-result js-form-wrapper form-wrapper" data-drupal-selector="edit-result" id="edit-result">    <p>2 Stimmen mit einer Bewertung von 3.5
2 Stimmen mit einer Bewertung von 3.5</p>
</div>

Can you precise question 1?

This only happens if voted. If count-of-votes = 0 there is no double output