I am automating emails in a Smart Campaign that is utilizing Velocity Scripted Tokens that are being populated with fields from a Custom Object. I have been running this campaign since June and just realized that about 25% of the recipients seem to be getting errors with the tokens when I look in preview mode. It is strange because it is working for the majority of the recipients but not the 25%. I looked at their custom object to insure the fields were populated, and they are. I am not sure if this is an actual error, or if it is just something wrong with Marketo's Preview Instance.
I've attached screenshots to show when the tokens work, and when I get an error. Any explanation?