> The change was first spotted by users on Reddit and confirmed in an updated Netflix support page (via Android Authority), which now states that the streaming service no longer supports casting from mobile devices to most TVs and TV-streaming devices. Users are instead directed to use the remote that came with their TV hardware and use its native Netflix app.
My guess is that adblock became too easy on smartphones, so by forcing people use the app on the TV it makes harder for people to bypass the ads.
That's pure speculation, as I don't have any subscription from netflix. But I've used this method with the HBO app and it works 90% of the time, so I'm assuming netflix has the same issue.