Now find a simple solution and maybe it can help others:
Adding a div with css class 'markdown-content' and adding relevant markup:
HTML:
<div class="markdown-content">
@{ textYourField | markdown }
</div>
CSS:
.markdown-content ul {
list-style: disc;
}
.markdown-content p {
padding-top: 10px;
padding-bottom: 10px;
}