issue on extensible flexfield dependence

Hi everyone,
I'm having a issue with the assignment's extensible flexfields. I created two custom flexfields in a specific context.
One field is a date field, and the other is based on department extraction.
The goal is to extract the active departments on the date selected in the custom date field of the previous flexfield.
I'm attaching the document with screenshots of the configuration and the incorrect system behavior.

Best Regards,

Teresa