ERPNext don't display message body


When ERPNext is synchronizing my emails (aka displaying emails from my provider), it is not displaying the body of the email.

No logs, no errors. I tried to change the type of content in HTML, it did not work.

Sending in an email to myself with ERPNext actually display the body. Answering an email without a body is also working.

As you can see, the body from the first email is not display: