When receiving a call, why does my Watch 3 Pro sometimes show the name of the caller, and sometimes show the number?

1. Make sure that the Nothing X app is connected to the Watch 3 Pro.
2. Make sure that the contact has been added to the contact list in the Nothing X app. To do this, follow these steps:Open the App, go to My Devices> Device settings >Frequent contacts, and click "+". For added contacts, the name and phone number will be displayed. For unadded contacts, only the number will be displayed.
3. If the above instructions cannot resolve your issue, press the button on the Watch 3 Pro to enter Settings >System Menu, then click Restart. Or, press and hold the button, then click Restart and check again.
4. To experience the latest firmware features, you can upgrade the firmware to the latest version in the Nothing X app. To do this, open the Nothing X app, go to the My Devices>About >Firmware update.
5. If the above steps do not resolve the issue, press the button on Watch 3 Pro to enter Settings> System Menu. Click Reset. Then, check again to check if the issue is resolved.