Sharing link to sandbox does not have any code updated

[Nantris]

🐛 bug report

Preflight Checklist

• I have read the Contributing Guidelines for this project.
• I agree to follow the Code of Conduct that this project
  adheres to.
• I have searched the issue tracker for an issue that matches the one I want
  to file, without success.

Description of the problem

Sharing link to sandbox does not have any code updated.

How has this issue affected you? What are you trying to accomplish?

This is frequently happening and then I think, "Okay I guess I have to fork it?" and it tells me I already own it... All the files are saved.

To Reproduce

Use CodeSandbox, ever, in any capacity, in my experience.

Link to sandbox: link (optional)

Your Environment

Software	Name/Version
Сodesandbox
Browser	Chrome
Operating System	Linux

[Nantris]

The fork is also not updated. So basically all the work gets lost unless you manually copy/paste it to a new fork.

[Nantris]

Ha, and then after forking I get {"error":"Missing required parameter preview_url"}

Lovely.

You guys easily have the best environment, BUT IT DOESN'T SAVE PROPERLY!

[Nantris]

Every damn time I use this site...

[Nantris]

Moved to StackBlitz

[aaegorof]

Same here...

[CompuIves]

Hmm, so if I understand correctly, if you share a link to a sandbox with someone else, and they start editing it, they get an error back and the code is not saved? I'm looking to repro & fix this.

[karlhorky]

I'm also seeing this in some Next.js devboxes lately... 🤔

Example devbox: https://codesandbox.io/p/devbox/fast-tree-x7zpn2?workspaceId=ws_GfAuHrswXyA1DoeSwsjjjz

[karlhorky]

Oh, this devbox was private - I made it public now.

And... now the preview works again 🤔 Wonder if this has to do with private devboxes?

[Nantris]

Making it public did not resolve my issue - but the fact that the share button doesn't imply making it public is crazy in itself.

[CompuIves]

Interesting... I will take a look at the preview_url error, I've seen this before, it relates to our private preview authentication. I think it might be a race condition, and a refresh (or opening the page itself) might fix it. Could you try if that works? That would help me debug the root cause.

but the fact that the share button doesn't imply making it public is crazy in itself.

We don't automatically make it public/unlisted because you can still share it with members in your workspace. This is the same behavior/UX as Google Docs/Drive, Figma and Notion so it's not that uncommon.

[karlhorky]

@CompuIves here's some reproduction steps:

1. Open https://codesandbox.io/p/devbox/github/karlhorky/next-mdx-dynamic-import-demo
2. Hit Fork
3. Observe the following on the resulting forked devbox (eg. https://codesandbox.io/p/devbox/serverless-breeze-c9hk86?workspaceId=ws_GfAuHrswXyA1DoeSwsjjjz - again, a private devbox)

Note: This only applies for my case - maybe there are multiple cases, since making the devbox public did not help with what @Nantris was experiencing.

[CompuIves]

I think this must be a race condition, I've been trying to repro it but couldn't yet. I've also asked the team to see if they could repro it.

[joshwooding]

I get this too but only when I'm using Chrome Beta. If I use the standard version of Chrome I have no issues.

[CompuIves]

Oh! That's a very good indication. Perhaps there is a new Chrome security change that's only enabled for x% of browsers. I have seen this before (with partial cookies) where some Chrome instances had it enabled and others didn't, to do a gradual rollout.

[karlhorky]

In our case, I've seen this intermittently since months, on regular stable Chrome versions. (didn't try other browsers)

[Nantris]

@CompuIves I have seen this issue for many months before finally filing an issue.

[karlhorky]

Another example sandbox which shows the {"error":"Missing required parameter preview_url"} message:

• https://codesandbox.io/p/devbox/filehandle-readablewebstream-with-new-response-forked-mszlgw?file=%2Findex.js%3A21%2C22

If there's anything that I can do to debug or make these reports more usable or actionable, then let me know - happy to help!

[rbalet]

Maybe helpful note, but I do always get this error on safari

[jame-earnin]

I do confirm that the error {"error":"Missing required parameter preview_url"} occur with the latest chrome update (Version 135.0.7049.41 (Official Build) (arm64).
I use old edge. It works fine. (Version 135.0.3179.54 (Official build) (arm64))