Subagent message not visible after re-arranging chats

Testing #331068

On Windows:

I had 4 different chats in a session, one of them subagent.
I rearranged the chats veritically
Now I am not able to see the chat user message (Count JSON files) . I see blank 

<img width="2079" height="899" alt="Image" src="https://github.com/user-attachments/assets/9c6ecb93-0a6f-4870-b952-0cbb49e1e9a4" />
