Converter called multiple times evaluating aggregation operation query methods about spring-data-mongodb HOT 5 CLOSED

@WritingConverter
public class EnumWriteConverter implements Converter<ConverterEnum, String> {
    public EnumWriteConverter() {
    }

    public String convert(ConverterEnum source) {
        return source.getValue();
    }
}

public interface ConverterEnum {
    String getDescription();

    @JsonValue
    String getValue();
}

public enum EnumCommerceItemDeletedEnum implements ConverterEnum {
    ENUM_COMMERCE_ITEM_DELETED_DELETE("Delete", "DELETE"),
    ENUM_COMMERCE_ITEM_DELETED_UNDELETE("Undelete", "UNDELETE");

    EnumCommerceItemDeletedEnum(String description, String value) {
        this.description = description;
        this.value = value;
    }

    private final String value;
    private final String description;
}

@Aggregation({
    "{$addFields: { '_idString': { $toString: '$_id' } }}",
    "{$match: { userId: ?0 }}",
    "{$match: { deletedEnum: ?1 }}",
    "{$count: 'totalCount' }"
})
Mono<Long> count(String userId, EnumCommerceItemDeletedEnum deleted);