[Bug] Reset consume offset then the consumer cannot continue consume immediately

**BUG REPORT**

1. Please describe the issue you observed:

- What did you do (The steps to reproduce)?
Reset the consumer's consume offset
- What did you expect to see?
The consumer's consumption offset was reseted, and the consumer can continue consume immediately.
- What did you see instead?
The consumer's consumption offset was reseted successfully, but the consumer continue consume message after about 2 minutes when receive the broker's balance notification again.
2. Please tell us about your environment:

- What is your OS?
Ubuntu & CentOS
- What is your client version?
latest
- What is your RocketMQ version?
4.9
3. Other information (e.g. detailed explanation, logs, related issues, suggestions on how to fix, etc):
After reseting offset, the consumer group detail cannot show the clientID, while the consumer client is still online.

Reproduce the reset-offset scenario with the C++ client against RocketMQ 4.9 on the reported Ubuntu or CentOS environments. Trace the reset-offset handling and the broker balance-notification path, using the missing clientID in consumer-group details as a diagnostic signal. Done means the consumer resumes immediately after reset and remains visible in the group details.

Written by the indexing model from the issue text.