I'm experiencing a puzzling problem with my iCloud Notes. When I switch from a China-based phone number to a US-based phone number, the notes stored in the iCloud account are nowhere to be found. I've tried uninstalling and reinstalling the app, but it didn't resolve the issue. Interestingly, when I log back into the China-based number, the iCloud Notes magically reappear. I've also tried switching to a different phone, but the issue persists. Could someone please help me figure out what's going on with my iCloud Notes?