Hi Jay,
This sounds similar to an issue we fixed in a newer build. Please see the release note below:
Build 8776 (Jan 11, 2024)
Fixed: Forwarding an email that contains attachments retains all attachments on delivery even if one or more attachments were removed in the compose window.
If you get upgraded to the latest build, it should resolve this behavior.
Andrea Free
SmarterTools Inc.
877-357-6278
www.smartertools.com