Prompted by Joomla 4.0 does not save the article with Joomla fields which is (at the time of this post) On Hold for being:
Off-topic: "Questions must be specific to Joomla. Generic questions about web, programming, 3rd party software, servers, hosting etc, even if they are found in the Joomla-sphere, are off-topic. It might be better asked at Stack Overflow or another SE Site. For Joomla Extension Support better use their developers' support channels first. More info: help center"
This is a question that seems to point to a potential bug in the not yet released Joomla 4.
If the most appropriate place to post this issue is on GitHub, I think this guidance should be clearly stipulated in the Help Center and either a new close justification be created or an existing Off-topic justification should me appended with this reason.
Ultimately, we don't want JSE to be an extension of Joomla.org/GitHub's issue reporting process. We don't want Joomla core developers to have to comb the questions here for issues there.
I guess a minor adjustment would be to rephrase as:
If it's the latest or a not-yet-released Joomla version, then use Joomla.org and report there what you have found. ...or GitHub?
and the message displayed on the closed page should reflect this condition.
A few more things...
Overly complex or specific things.
This seems like it is very subjective and potentially unfair.
If a question is overly complex, but sufficient details have been provided so that the question is not Too Broad, then we shouldn't deflect "tricky" questions.
If a something is very specific, and the question provides sufficient details to make the issue reproducible, then it should be fair game.
I don't see a lot of questions being closed for this reason and I think this is a good thing. It will only encourage more growth in the community if there aren't too many rigid restrictions on Joomla-associated questions. Furthermore, since we want Joomla users to search for Joomla-related issues here, I think it is a good idea to grant some lenience on this point so that researchers have a better chance of finding a solution here.