When an email is sent, the ‘Memo’ field does not have the correct value populated. It shows the tax description or item description values from the last line item.
The field sourced in the Email template is by ‘${transaction.createdfrom.memo}’.
To fix this, the Email template field should be changed to ${transaction.createdfrom.memomain}. With this change, only the body field memo is populated on the Email sent.
The same applies to saved searches while trying to fetch the body memo field from a transaction record. The field ID for the body memo field is ‘memomain‘.