Please check the following areas:
PDF documents: If the image sent was in a PDF file type, convert this to a *.TIFF or *.TIF file type and re-send, we are aware of a processing issue around a limited number of PDF flies/templates.
Catch all destination: Any image that a destination folder could not be identified will be pushed into the designated catch-all destination folder.
Email addresses: If the user who sent the email is new ensure their email address is in the scan destination folder and general settings.
All emails/scans are not being received as images: Please contact us and reference this article, please confirm when the invoices stopped processing.