bug: slow response after terminate the conversation

[cht132]

Describe the bug close / terminate the conversation of the streaming output will introduce slow performance of new chat

To Reproduce Steps to reproduce the behavior:

1. start the check enable with stream
2. when nitro streaming text output, close the chat from client
3. in server log, it displayed "Task completed, release it - llamaCPP.cc:416"
4. start the new chat, it will be slow response until restart nitro from server

Desktop (please complete the following information):

• OS: Mac
• Browser chrome