Samsungs lack of support and promises are minimum. False promises for evolution upgrades and software updates.
I hate to say but the js series is well out of date and the chances of them updating is next to zero.
i have the same problem, i bought this specific tv (it was my first, and now my last samsung tv ever) because they promise that it will be "future Proof" with constant update, now in 2020 i have a very good tv panel with a very poor software, and a simple update can resolve all of my problem on a 4500€ tv.... Mind that i have a second samsung tv in my bedroom that cost to me 400€ and compared to the big one is a rocket, and the difference in only between the software. This is a Shame