java.util.Date serialized as epoch millis after Spring Boot 3.5.x / CAP 4.4.x upgrade

[LakshmiTN129]

After upgrading to Spring Boot 3.5.x and CAP Java / CDS 4.4.x, all java.util.Date fields in our DTOs that used to serialize as ISO strings (e.g., "2024-06-01T00:00:00.000+00:00") are now serialized as epoch milliseconds ("1714521600000").

Tried approaches that didn’t work:

spring.jackson.serialization.write-dates-as-timestamps=false

spring.jackson.use-jackson2-defaults=false

@jsonformat or @JsonSerialize on DTO fields

Are there alternative approaches recommended in CAP 4.4.x for enforcing ISO 8601 globally?