Front is adding blank line before bullet list in draft posted via API

I have a tool that POST a draft, with a body formatted in HTML like:

“<p>Based on the information provided, we are pleased to offer you a quote of:</p>
<ul>
<li>Transport: EUR <strong>200</strong> (Excl. VAT)</li>
<li>Insurance (optional, on declared value) : EUR <strong>20</strong> (Excl. VAT)</li>
</ul>”

When I visualize the draft created in Front (app or web browser), I see a blank line before the list:

When I inspect the object, I see a <br></br> balise, which was not in the original HTML.

This disappears when I’m viewing the draft as another person (viewer mode).

And so when I send it, the blank line remains.. This is quite problematic as it gives something weird visually.