Decide what you want the next screen to do
Geo IPTV app switching should start with a simple question: are you returning to a responsive player, or is that player ignoring input? Apple describes opening the app switcher with two presses of the TV button, then selecting an app. Before trying it, note the player name and the screen you want to return to. Moving between apps is a navigation choice, not a reason to change the subscription or remove a saved setup.
Keep quitting as a separate troubleshooting step
For an unresponsive app, Apple describes highlighting it in the switcher and swiping up to quit. Use this deliberately for that app; repeatedly closing every app is not a useful comparison. Note any unfinished action before closing, then reopen the same player and repeat one simple action. Do not assume the previous programme position will be preserved. Avoid deleting the app, erasing its data or resetting the whole Apple TV for this first check.
Report the smallest reproducible difference
Record the Apple TV model, tvOS version and player version, plus whether ordinary menu navigation worked. Describe whether returning to the app or reopening it changed the symptom. If the issue repeats, include the exact screen and the action immediately before it. These observations help separate a navigation problem from a playback complaint; they do not prove a service-wide outage or a backend logout. Give support those details without passwords or private playlist addresses.