Pictures gone when sent but composing was okay

My emails usually involve a lot of inserted pictures and when I have to send another email update with new pictures, I use Reply All from sent box. 
Problem is, when I compose the reply email, all previous pictures will show fine until I send the email (with a CC sent to myself), only new pictures would show and any inserted pictures from previous will turn into an “X” place holder.

Is that a bug in the system or some how my ISP is removing all my pictures from it?

Hello Ricky,
could you send an EML file of such email to [email protected] with a link to this forum topic so I can check the data and get back to you?

Regards,
Olivia