I have a UE40H6400AKXXU smart tv and recently it has been asking me to upgrade some apps. Silly like I accepted and now one of my favourite apps The Weather Network has problems which it never had before. It wont display any of the maps of the weather (used to be fine) and the Samsung Smart remote control can only be used in what I call "cursor mode" with the arrow keys and the pointing mode which is much easier no longer works.
Previously I had a choice of maps of weather, radar, traffic and the interactive pointer worked just fine.
Surely there must be a way to go back to the previous version of the app ? I am now on the March 2017 version but I did not record the previous version I had loaded.
Is the software of your TV up to date? Go to Menu > Support > Software Update > Update Now.
Also, you can try a Smart Hub reset which will remove all your apps before downloading again from scratch. Go to Menu > Smart Hub > Reset Smart Hub. Let us know how you get on.