"launching" the app can happen 2 ways.
- App starts up from scratch, was not backgrounded.
- App resumes from being backgrounded.
This is how apps work on iOS and tvOS. You'll know it started from scratch because you'll see the loading screen with the logo.
If you chose the first option, the the only time the section is forced is when you first open the app. If you leave the app, and come back to it (and it hasn't been force closed by the system), it will not force the section.
If you choose the second option, it will do the above, as well as force the section when you open the app up again after being backgrounded. BUT, it only does it if you've been away from the app for more than 60s.
Scenario 1: You start up the app and it hasn't been used for a while so it's starting from scratch, it will automatically go to the section you chose.
Scenario 2: You are in the app, and leave it to do something else like go to Settings. You come back less than 60s later and it does not force the section you set.
Scenario 3: You are in the app, and leave to watch something on netflix. You come back to Channels and it forces the section.