Failing to render the jira macro results from time to time

I've also just checked, in the version where this was originally reported, the code in the JIRA macro was different, but also back then a null was part of the ID on xwiki.org as the username was quite likely null on xwiki.org at https://github.com/xwiki-contrib/jira/blob/638597781a7a768ec794ef81c4c547fff3610ada/jira-macro/jira-macro-platform/src/main/java/org/xwiki/contrib/jira/config/internal/JIRABlockAsyncRenderer.java#L166-L170

This is also visible in the screenshot where after the JIRA URL the wiki/xwiki part follows instead of the username part, further confirming that even back then, empty URL segments were a problem that lead to wrong async IDs.