VILA1.5 13B somtimes will return empty value

[tim_lin1]

@kesong

“messages”: [
{
“role”: “system”,
“content”: “You are a helpful AI assistant.”

    },
    {
        "role": "user",
        "content":[
            {
                "type": "stream",
                "stream":
                {
                    "stream_id": "a782e200-eb48-4d17-a1b9-5ac0696217f7"
                }
            },

            {
                "type":"text",
                "text": "Can you describe the scene?"
            }
        ]
    }
],
"min_tokens": 1,
"max_tokens": 128

}

I think the problem is the order of the content.
The content I used before is:

"content":[
            {
                "type": "stream",
                "stream":
                {
                    "type":"text",
                    "text": "Can you describe the scene?"
                },
                {
                    "stream_id": "a782e200-eb48-4d17-a1b9-5ac0696217f7"
                }
            }
        ]

The issue have solved after I change the order of the content.
Thank you!