IDE Extension goes blank

What version of the IDE extension are you using?

1.129.1

What subscription do you have?

ChatGPT Pro

Which IDE are you using?

VS Code

What platform is your computer?

Darwin 25.5.0 arm64 arm

What issue are you seeing?

<img width="3024" height="1964" alt="Image" src="https://github.com/user-attachments/assets/74c68c40-1bc6-4750-9240-9a26f115872b" />

and after I restarted the IDE, i saw this at the end of the chat session i was working on

Invalid Value: 'tools'. Function 'collaboration.spawn_agent' is reserved for use by this model and must match the configured schema.

What steps can reproduce the bug?

Happens randomly for me, while working,

I told 5.6 Sol to spawn subagents running on GPT-5.3-Codex-Spark to write code instead of coding itself - this particular time, so I am suspecting this has to do with this blank screen, but this has happened with me before as well without any special instructions

What is the expected behavior?

It must not go blank, and maybe tell me if I did something wrong on my end

Additional information

_No response_