Same goes for me. Device is 2.2.16 and fire tv app is 1.3.4 build 8000117. I don’t notice any improvement on the studder compared to the prior version. It may not be an obvious studder if watching a fast moving action scene but it’s more obvious if you are watching a consistent slow scene with a car driving down the road. It’s also not noticeable if the picture is still. Annoying enough where I haven’t ditched my dish yet.