[BUG] JSONB 序列化多个自引用对象时，除第一个外 self 字段反序列化后为 null #7746

import com.alibaba.fastjson2.JSONB;
import com.alibaba.fastjson2.JSONWriter;
import com.alibaba.fastjson2.TypeReference;

import java.util.ArrayList;
import java.util.List;

public class Demo {
    public static class SelfBean {
        public String name;
        public SelfBean self;
    }

    public static void main(String[] args) {
        List<SelfBean> list = new ArrayList<>();
        for (String name : new String[]{"a", "b"}) {
            SelfBean bean = new SelfBean();
            bean.name = name;
            bean.self = bean;
            list.add(bean);
        }

        byte[] bytes = JSONB.toBytes(
                list,
                JSONWriter.Feature.ReferenceDetection,
                JSONWriter.Feature.FieldBased
        );

        List<SelfBean> parsed = JSONB.parseObject(
                bytes,
                new TypeReference<List<SelfBean>>() {}.getType(),
                com.alibaba.fastjson2.JSONReader.Feature.FieldBased
        );

        // parsed.get(0).self == parsed.get(0)  // OK
        // parsed.get(1).self == null           // BUG: should be parsed.get(1)
        System.out.println(parsed.get(0).self == parsed.get(0));
        System.out.println(parsed.get(1).self);
        System.out.println(parsed.get(1).self == parsed.get(1));
    }
}