Hello Relucantappleuser,
To help us get a better understanding of the issue, we’d like to ask a few questions.
1. Does the issue happen with all content, or only certain content?
2. Do you receive any errors when the issue happens? If so, what does the error say?
3. Do you experience the same behavior if you access the Apple+ app on other devices?
4. Do you experience the same issue after resetting the Apple TV+ app as well?
The above details will help us plan how to proceed.
This link outlines how to reset the Apple TV+ app, and may help: Get the Apple TV app or Apple TV+ app on your smart TV or streaming device
Reset the Apple TV app or Apple TV+ app
Resetting the Apple TV app or Apple TV+ app removes your personal information and restores the app to its original settings. If you plan to sell or give away your device, or uninstall the app, you might want to reset it first.
1. Open the Apple TV app or Apple TV+ app.
2. Go to Settings.
3. Choose the Reset option.
If you lost or can't access your device but are still signed in to the Apple TV app or Apple TV+ app, remove the device from your Apple ID device list.
If you reset the Apple TV app or Apple TV+ app on a smart TV that's also signed in to the Apple Music app, the Apple Music app restores to its original settings.
Thanks!