Noticeable delay when running code line-by-line using remote SSH in quarto document

System details:

Positron and OS details:

Positron Version: 2025.03.0 (system setup) build 97
Code - OSS Version: 1.96.0
Commit: 5e22d6f831ad2a23b08e66de8111e693b30afaf1
Date: 2025-02-25T20:39:11.000Z
Electron: 32.2.6
Chromium: 128.0.6613.186
Node.js: 20.18.1
V8: 12.8.374.38-electron.0
OS: Windows_NT x64 6.2.9200

Device

OS: Windows WSL2
Virtual Environment: conda

Interpreter details:

R 4.4.2 and Python 3.12.3

Describe the issue:

When I run code line-by-line in Quarto via remote SSH, there is a noticeable delay in the time it takes for the code to be sent to the console for execution, compared to when I run code line-by-line in Python or R files. I use a mix of Python and R in my code. There is no perceptible delay when running code line-by-line locally or when running code line-by-line in a script file on remote. I noticed that another issue also reported this problem, https://github.com/posit-dev/positron/issues/5079. I don't expect to compile the entire document with Quarto, but I do want to use Quarto as an attempt to mix Python and R coding.

Steps to reproduce the issue:

---
title: "Untitled"
format: html
---

## main

\`\`\`{python}
import pandas as pd
import io

df = pd.DataFrame({
    'Name': ['Alice', 'Bob', 'Charlie'],
    'Age': [25, 30, 35],
    'Score': [90, 85, 88]
})

csv_buffer = io.StringIO()
df.to_csv(csv_buffer, index=False)
\`\`\`

Start with the Quarto reproduction in the issue and compare line-by-line execution over remote SSH with execution in remote Python or R script files. Investigate the path that sends mixed Python and R code to the console; done means the delay is eliminated or its cause and limits are documented.