There's no way they're unaware, blissfully or otherwise. A ton of us have reported this via feedback, and I have to imagine at least some of the developers or whoever are using iPhones and have seen this for themselves. Which means it's either a bigger issue to fix than we think it should be, or for some reason, they don't think it's a high priority to address.
I love Apple and their products, but their resolute silence is so incredibly frustrating. With the way they don't address or acknowledge anyone's concerns, ever (until they're fixed), it's a wonder any of us have stuck around. Maybe it's policy, but it's also horrendous, arrogant customer service.
(This calendar notification thing really riles me up 🙂 )