Hi there Emmachapman2828,
Thanks for participating in the Apple Support Communities. We understand that your camera takes Live photos while the 'Preserve the Live Photo setting' switch is enabled. Let's see how we can help. It appears that you've reviewed Take and edit Live Photos, which is a great. If you haven't done so already, restart your iPhone. Sometimes a simple restart can fix minor issues. If the issue persists, make sure you're running the latest compatible iOS version: Get the latest software updates from Apple.
If you need more help, reply with the answers to these questions:
- Does the Live Photo switch in Preserve Settings seem to turn itself off?
- When you open the Camera app, does the Live Photos button have a slash through it?
Best regards.