Hi
If you have not yet done so, it may help to update the LINE app (a third-party app) to the latest software version:
LINE on the App Store
If any users are sharing an Apple ID, then they should stop doing so. Each user should have their own Apple ID and be signed in accordingly on their own devices.
Keep in mind that how notifications behave depends on the status of your devices and your settings. With Wrist Detection enabled, in order to bring notifications to your attention as soon as possible:
- If your iPhone is unlocked, then you will receive notification alerts on your iPhone instead of on your Apple Watch.
- If your iPhone is locked or asleep and your Apple Watch is unlocked (regardless of whether the watch display is asleep or awake) and on your wrist, you will receive notification alerts on your watch.
- If your Apple Watch is locked or has Do Not Disturb enabled, then notifications will go to your iPhone.
- More information: Notifications on your Apple Watch - Apple Support
Otherwise, for assistance with issues concerning use of the LINE app in conjunction with Apple Watch, I suggest that you consult the developer's app description and support resources and, if required, contact the developer for assistance:
Support resources:
Contact the developer:
