Occasionally, a rep logs a received email using the "Log with Marketo", but when you click the subject in the Activity History section of the Contact record, the Comment does not have a link to display the email, instead it has "From: Mike Lewis mlewis@xxxx.com. [Email details are being uploaded from Marketo...please check back later]", but the email is never available. The email is available for viewing in the Email tab of the Sales Insight section, however.
Has anyone else noticed this and if so, do you know why this occurs?