We have added a new Large text Record field type. Using this new type you can store up to 15,000 characters in size. To support the larger data size you cannot currently query this new field.
The new type is stored as an Artifact object on the Record report. It is displayed within the record table as a normal column on the table and is part of the returned record event when a new record is created from the storyboard.
To enable us to support more advanced and powerful Record query patterns going forward, with this change, we are also going to limit the standard text field to 512 characters for new Record reports. Existing Record reports, will not be affected by this change.