Field Calculator Processor and Field Calculator (Regular Expression) Processor nullifies a nested target field when updating an existing field.

Workaround

• Use the Field Calculator Processor and Field Calculator (Regular Expression) Processor only on Top level fields in nested GeoEvent Definitions.
• Use the Field Mapper Processor to flatten GeoEvent Definitions prior to using a Field Calculator Processor and Field Calculator (Regular Expression) Processor.

Steps to Reproduce