Within the last couple of weeks there has been a change to CRM with regards the timeline view and E-Mail attachments.

Prior to the change, email attachments which are embedded images was not shown on the timeline view. This made it easy from a record to identify email attachments which users have added manually. Since the update, in addition to normal attachments, embedded attachments are shown. This can result in 15-20 email attachments shown (especially when emails have lots of embedded images). This can make it hard to find an attachment which the user has attached. Opening the email will show only the attachments which the user has attached.

The idea is to revert the logic back to how it was previously:

Embedded email attachments should be hidden on the timeline view. User added attachments should be visible.