Before posting this I wanted to be sure, as sure as I could be anyway. So, everyday since I opened the ticket with weather channel app support I tried updating the app. Highlight the app in the home screen, hit the star button, you all know the drill. Last week there was actually an update, the app finally updated for me and the on demand content has been working as expected for over a week now. Weather Channel App version 4.4 build 18. TCL TV Roku System is Version 11.5.0 build 4312. Also, that update fixed the issue on a Roku stick plugged into another Samsung TV.
Well, I'm still running into problems. I finally got the app updated (for a week or so it just told me I had the latest version) and then on demand worked. But I came back the next day and I just had the "loading circle" spin on the screen. I then deleted the app, reinstalled it, and on demand worked again. But, again, after shutting it down and coming back a day or two later, I get the same issue. If I want to watch on demand, I have to delete the app, reinstall it, sign back in, then everything works as it should as long as I'm on the app or come back that same day.
After removing a channel, best practice is to restart your Roku to clear its memory cache before reinstalling the channel. Without the restart you may not get a clean reinstall.
Depending on your Roku model and Roku version number you'll find the System restart option under either Settings > System > Power or under Settings > System.
