Container Sandboxes do not update / seem broken

[NullVoxPopuli]

I made some file changes to https://codesandbox.io/s/hardcore-drake-hz7kw?file=/app/templates/application.hbs
which was forked from: https://codesandbox.io/s/github/NullVoxPopuli/ember-new-output/tree/stable-sans-linting

The server booted, and then never updated the preview. There have been no errors in the console/terminal.
I tried opening a new terminal to check git status to see if my changes were even saved, but the terminal is just blank no prompt at all.
Also, the Problems tab (and the editor squiggly) show an eslint error.

• my project doesn't have ESLint?
• I fixed the error by finishing typing my import.

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Update:
it looks like the files did save, but the running server seems to be forever cached somehow? even though I've restarted the container and the server?

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Update again:

after clicking "Restart Server" again, it seems to work.

What can be done about this? I've had absolutely the worst experience with container sandboxes 😢

[andrasbacsai]

I've check your example sandbox.

Hot-reload is not working, unfortunately, but I see the new content if I reload the preview window.