Bug: maka loop leads to repeated empty AI replies and cannot be interrupted by message

### Description

On maka Desktop, maka occasionally gets stuck in a loop that produces repeated empty AI replies. During the loop, sending a new message does not interrupt the run.

### Steps to reproduce

1. Start a task in maka Desktop.
2. Trigger an agent loop.
3. The model returns repeated empty AI replies.
4. Send another message to try to interrupt the loop.

### Expected behavior

The loop should stop producing empty replies, and sending a message should interrupt the run.

### Version

latest