(Firefox 150.0 on Fedora Linux) dev.java embedded playground examples with "Run" and "Reset" buttons are no longer runnable after clicking "Reset"

[willy-b]

Hello dev.java team!

Thanks for all the content.

After making edits in some of the embedded Java playground widgets in some of the dev.java articles (e.g the 2nd example in the Teeing example of Creating your Own Collector, https://dev.java/learn/api/streams/custom-collectors/#teeing or any other widgets on that page with "Run" and "Reset" buttons),
if I click reset, the playground widget is no longer runnable and a page refresh is required:

The error message is

Error ⮕ The Java Playground returned an unexpected response format.

Steps to Reproduce:

• visit the " Creating your Own Collector" page of the Streams tutorial series at https://dev.java/learn/api/streams/custom-collectors/#teeing
• scroll to the 2nd runnable embedded Java Playground example within this "Combining the Results of Two Collectors with the Teeing Collector" subsection of Creating your Own Collector, the one with "Run" and "Reset" buttons
• click "Run" and observe it compiles and runs the example as many times as clicked
• click "Reset" and observe any changes are reverted (no changes are necessary to reproduce)
• click "Run" and observe the error message instead of output if "Reset" has been clicked

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Thanks very much!

[danthe1st]

I think this repo is mainly about the actual content on the https://dev.java site while https://github.com/java/devrel/issues is the right place for issues regarding the Playground as far as I know (though I think it probably doesn't make much of a difference).

That being said, looking at the devtools, it seems like pressing the Reset button followed by the Run button seems to send a request with an empty snippet to the server.

{"option":"na","prefixId":"","snippet":""}

As a workaround, you could also just make a slight modification to the content (e.g. add a comment) and it runs again without refreshing.

(Note that I don't have authority here, I am just an outside person and not a maintainer.)