[edit my scanning the article missed that they answered this :D]
The obvious answer question is whether they reported this to apple already and are using this post to draw attention to it, or if they’ve found the bug in the betas (which is why betas exist) but then not reported it directly (defeating the purpose of betas)
If you read the article, they mention that they’ve reported the bug in previous versions of the beta and it has still not been fixed in the latest version. They’re cautioning their users against upgrading in two weeks when the release comes out of beta unless there is confirmation that the bug has been fixed.
The obvious answer question is whether they reported this to apple already and are using this post to draw attention to it, or if they’ve found the bug in the betas (which is why betas exist) but then not reported it directly (defeating the purpose of betas)