Batch send msg to wrong topic

[MaOreoreorui]

BUG REPORT
Please add the branch name [Native]/[Master] at the header of the Issue title.

1. Please describe the issue you observed:

   • What did you do (The steps to reproduce)?
     Batch sending messages to multiple topics.

   • What did you expect to see?
     Return an error to tell me that there is something wrong with my usage.

   • What did you see instead?
     No error returned.All the messages are sent to the first topic.

2. Please tell us about your environment:

   • What is your client version?
     v2.1.0

3. Other information (e.g. detailed explanation, logs, related issues, suggestions on how to fix, etc):
   Java client check this logic