Images appearing inline on outgoing emails even though attached as files

Having some trouble sending images as file attachments:

Images attached to outgoing emails as files (not drag and dropped into place) are being “converted” into inline images at the end of the email where the “file attached” links appear.

The images appear as files until the email is actually sent, I can see the process of creating it as an inline image before the email disappears. I’ve tested this out a few times by sending emails to myself and the emails come through with images inline at the end of the email.

I tried attaching other files, pdf’s etc, along with the image files, but the images still arrive open and inline alongside the other file attachments at the end of the email.

Can’t find any threads with anyone having the same problem but hoping someone will explain that I’m just being an idiot and I just need to push a button somewhere.

Gary