Hi Community:
The following is a call chain for a batch message scenario. From the
figure, you can see that only one upstream call chain (the last one in the
figure) can be associated with the batch message Span, and the other upstream
call chains are displayed as VNodes.
如下是一个批量消息场景的调用链，从图中可以看到只有一个上游调用链（图中的最后一个）可以和批量消息Span关联起来，其他的上游调用链都显示为VNode。
I would like to ask whether this is an expected behavior or a bug.
Wouldn't it be better if all upstream call chains could be related? However,
this does bring about a problem, which is a bit confusing.
我想请教一下，这个一个预期的行为，还是一个Bug。如果能把所有上游的调用链都关联起来，是不是更好？不过这也确实带来一个问题，就是稍显混乱。
