Steps to reproduce:

1. Add a step in the scenario
2. Fill required fields (name, url, etc...)
3. Use Post type as Form data
4. Add more than one Post fields, and with macros in values
5. Save/Update step and scenario
6. Open scenario and the step again

Result:
Post type changed to Raw data and the field will be empty.
Expected:
Keep Post type as Form data and the fields with the macros.