JPG and JPEG attachments do not show up within messages from some providers

[gianlucagiacometti]

Prerequisites

• I have searched for duplicate or closed issues
• I can recreate the issue with all plugins disabled

Describe the issue

When I receive messages with attached .jpeg or .jpg files from some providers (Exchange and Gmail included), I see the clip in the message list but no attachment shows up either in the message preview or in the message if I double-click it.
If I forward to myself from my phone with Aquamail, it shows correctly.

This issue does not happen if I receive other type of attachments (.png, .pdf).

I have the latest roundcube git version updated today and I tried in all my 3 servers (with the same php8.3).

I checked the source and the attachment is there:

--0000000000003977590625b291eb
Content-Type: image/jpeg; 
	name="nice_pic.jpeg"
Content-Disposition: attachment; 
	filename="nice_pic.jpeg"
Content-Transfer-Encoding: base64
Content-ID: <f_m2vz2apx0>
X-Attachment-Id: f_m2vz2apx0

and goes on with encoded jpeg

What browser(s) are you seeing the problem on?

Chrome, Edge, Firefox, Other

What version of PHP are you using?

v8.3

What version of Roundcube are you using?

1.7-git

JavaScript errors

no errors in the console

PHP errors

no errors in log file