PDF attachment not previewing in the email when I'm composing it, just see thumbnail of attachment instead

Since I recently upgraded to OS Sequoia 15.1.1, I cannot see the preview of the pdf I am sending once I attach it to the email.

This only used to happen when the pdf had more than 1 page, now it's on any pdf.

Not sure if this is an OS Sequoia bug.

Any help or advise would be greatly appreciated.