Samsung didn't write the app. It's like asking Dell to fix something Microsoft wrote. There are folk that want to make a test case about this issue but I fear it will fail just like it did with PC makers. They host apps, they don't debug or fix the ones they didn't write.
We just purchased the 70" 6300 series TV, and it's great. But, there is one rather annoying issue. I find myself using Youtube quite a bit to watch 4K content. Unfortunately, every single time you turn the TV on, you have to authorize the Youtube app to see your own content. Very annoying to have to go hit a url, and type in a code. I contacted Samsung, and they don't support the app. It was suggested that I contact Youtube?!? Uhhhhhh.... no.
I can see were just going to have to upgrade our Roku. Annoying, as the Netflix and Amazon apps work just fine. If they sell it as a "Smart" TV, they should support it as one.