Some attachement are missing in emails

Hello all,

For some reason it looks that some kind of attachments are not visible in emails.
I have receive an email and I can see the paperclip showing there is an attachment available. However, when I open the email, I don’t see any attachment inside.

Behavior only occurs whith some kind of extention, I’m facing the challenge with an email having .eml files attached but I suspect it can be the same for other extensions also. I have no issue with pdf, Jpg, Doc or any kind of "standard attchement.

Thx in advance for any guidance