Flex Credit Calculation based on Benefit plan selection not working with Post Enrollment Calculation

Hi we have setup a Flex Credit program in the Oracle Cloud Benefits system. Our Flex credits are based on Bargaining unit , The Plan employee selects and option Selected by the employee. We created a UDT that returns Flex Credit values based on selected Plans and Options. Initially when the Life event is added and evaluated we default the Value to 500$ since there is no Plan/option selection to be passed on to the formula. Once the employee selects a specific plans we expect the allocated value to change. For example if the Employee Chooses Plan A and Employee