Automatically add required if a field is @notNull or @NotBlank

[lako12]

I have a project with Swagger 3, I noticed a different behavior compared to Swagger 2 and I think it's a bug because with a structure of a certain type, I can make the call to the API, but Swagger doesn't allow me to do it.

I have this API:

    @PostMapping(path = "/testOne", consumes = MediaType.APPLICATION_JSON_VALUE)
    ResponseEntity<String> testOne(@ParameterObject @Valid ClassOne test) {
        return ResponseEntity.ok("ok");
    }

@Data
public class ClassOne {

    @Valid
    private ClassTwo description;

}

@Data
@JsonIgnoreProperties(ignoreUnknown = true)
public class ClassTwo {

    @NotNull
    private String name;
}

As you can see, ClassOne has an object with the @Valid annotation and I am not obliged to pass it (because maybe I want to pass other attributes that I have not added in this example). However, the @Valid annotation ensures that if I pass any attribute that is inside that class, then it must respect the rules that I indicate inside (@NotNull etc.). The problem is that on the swagger it says required, even if I do not indicate required and therefore I cannot make the call to the API. This is therefore a problem as I said before, because I may want to send other attributes of ClassOne.
This problem occurs only in the case of @PraameterObject, while if I use @RequestBody, it is not mandatory.

In my opinion swagger should not automatically add requird if an attribute has the annotation @NotNull or @NotBlank, it should refer to what the user indicates with the annotation @Schema

attached is a zip with an example.
demo.zip