The streaming output is lagging, with data being sent in chunks

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### Dify version

1.16.0

### Cloud or Self Hosted

Self Hosted (Docker)

### Steps to reproduce

I use https，The streaming output is lagging, with data being sent in chunks

### ✔️ Expected Behavior

Normal streaming output

### ❌ Actual Behavior

_No response_

Start by reproducing the lag in the self-hosted Docker deployment over HTTPS and inspect where the streaming response is chunked or buffered. Compare the observed output with the expected normal streaming behavior; the issue does not name a file, test, or entry point to begin from.

Written by the indexing model from the issue text.