I have parental controls set to disallow R and TV-MA. But I saw in the viewing history that a channel had been watched inside the Roku App, which should have been blocked. When I tried to watch it on my PC (by opening the roku website on my PC web browser), it wouldn't let me watch it, and said a PIN is required to view. But when I use the TV, and opened the Roku channel, and go to "Live TV", and found the channel, then it opens with no problem at all.
And yes, the TV is logged into the correct account. And yes, the TV blocks other things, like the installation of new channels. Also, movies and TV shows in the Roku app are blocked. So, the parental controls ARE working on the TV, and working in the Roku app. The ONLY PLACE where it isn't working, is in the "LIVE TV" section of the official Roku Channel App.
I'm repeating myself now: this is happening on the same account, the "LIVE TV" section correctly blocks content if you view it on a PC using a web browser, but that same content is played without restriction if you view it using the actual TV, on the Roku Channel App.
I don't have a Roku TV. This is happening on a small Roku device that is plugged into the TV using an HDMI cable.
So, this is probably a bug report.