HackMd API fails to pull notes on lower band-with connections

[Taombawkry]

Is this a hackmd.io issue?

Yes

• [X] Yes, the bug happens on https://hackmd.io
• [ ] No. If it's a self-hosted CodiMD instance, please fire up the issue in the repo of CodiMD: https://github.com/hackmdio/codimd

Read our Official tutorial

It's on https://hackmd.io/c/tutorials/

或是中文版 https://hackmd.io/c/tutorials-tw/

What's the problem

Current behaviour

I am experiencing an issue where the HackMD API fails to pull notes when using US East servers or with lower bandwidth/internet speed providers (averaging 20-70 Mbps). The notes do not display unless I run my API in GitHub Codespaces or change my server location to US West.

Screenshot (optional)

Provide steps to reproduce:

1. Set up a server on the US East region or use an internet connection with bandwidth between 20-70 Mbps.
2. Attempt to pull notes using the HackMD API.
3. Observe that the notes fail to display.
4. Switch to a server on the US West region or use GitHub Codespaces.
5. Attempt to pull notes using the same HackMD API.
6. Observe that the notes display successfully.

Here is a link to the relevant HackMD API file: HackMD API File.

Expected behaviour

The HackMD API should be able to pull and display notes consistently, regardless of the server location (US East or US West) or the bandwidth/internet speed of the provider (within reasonable limits like 20-70 Mbps).

Environment

I use HackMD on:

Desktop

• OS: Ubuntu (WSL2)
• Browser: Firefox
• Browser Version: 90

Mobile

• Device: Samsung Galaxy S20
• OS: Android 11
• Browser: Chrome
• Version: 91

Additional context

This issue seems to be related to either a bandwidth requirement or a region-specific rendering issue. I have already added rate limiting logic as well as timeout retries, but the problem persists. It only works when using higher-speed connections or servers located in the US West region. This suggests a potential problem with how the HackMD API handles lower bandwidth or specific regions.

My HackMD API file: HackMD API File.