There have been some really horrible bugs at Apple lately. I'm still waiting on them to patch the camera bug in iOS 11 where if you try to use the camera in a web app pinned to the home screen, it shows the camera UI on a black screen. This dates back to June. How can it be that hard to patch such a glaring and embarrassing problem?
How many people are using the camera in pinned web apps? What's the app you use? I'd imagine most camera-related functions are already best served by native apps.
Does that make it OK? I mean, something as important to the web as getUserMedia is broken on websites only if you pin it to the home screen. Forcing people into Apple's walled garden doesn't seem like an acceptable excuse.