As the issue was closed without any good reason and I believe it needs to be fixed I clone/reopen it!
This is a serious lack of functionality, please provide a workaround or a fix how I can see the other 24 issues of 34 JIRA issues I just linked to my major pull request...?

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As shown in the screenshot below:

this pull request contains 11 issue keys

However, it is only showing the first ten issue