The app stores your channel list and guide on the device so that it opens instantly rather than making you wait for your provider on every launch. It then refreshes quietly behind you and replaces anything that changed.
That is almost always what you want, but it means a change your provider made minutes ago may not be on screen yet. Two ways to force it:
- Pull down from the top of the list and let go. That list is fetched again.
- Settings → Reconnect and refresh throws away everything stored and starts fresh.
Some providers update their film and series library on a schedule of their own, often once a day. If a new title still does not appear after refreshing, it has not reached your provider's own listing yet — nothing on your device will change that.