I’m not sure if this is the right place to put this, but I’ll give it a try.
I have noticed that the page for a package shows buttons to start a discussion or open an issue, even if discussions (or issues) are disabled on the source repo, which leads to a 404. My expectation here would be that the buttons aren’t shown if the repo doesn’t have the feature enabled.
This can be seen on a public package of mine from a repo where discussions are disabled.
Happy to provide more information if needed.