The Joomshaper "Formbuilder" does not email content apart from the email itself {{subject}}

I made a Formbuilder form with the standard: Name, Surname, Emailadres, Subject, Message.

When you complete the formbuilder form and send this, you only get an email with the content:

From:{{first-name}} {{last-name}}

Email:[email protected]

Subject:{{subject}}

Message:{{message}}

So the content the customer submitted is lost.

This is the content in the backend formbuilder:

Email headers:
Reply-To: {{email}}
Reply-name: {{first-name}} {{last-name}}
Cc: {{email}}

Email body:
<p><strong>From:</strong>{{first-name}} {{last-name}}</p>

<p><strong>Email:</strong>{{email}}</p>

<p><strong>Subject:</strong>{{subject}}</p>

<p><strong>Message:</strong>{{message}}</p>

Is there any way to fix this?

Thanks in advance!

I'm using Page builder 5.2.5 with Joomla 4.4.2