To recreate in 24.05 1. Use the basic editor to define the leader using the tag editor. 2. Copy the data in the field. 3. Edit the Default framework and paste the data into the 000 tag, default value field, save. 4. Go to the cataloging module and New Record, default framework. See that the 000 Leader field is blank. In 23.05 and 23.11, the field would contain the default value as assigned in the framework. Possibly due to CSRF changes for 24.05?