Hi! Sorry to hear that you're having trouble with your Vivo 1714's System WebView. There are a few things you can try to fix this issue without rooting your phone.
Firstly, you can try updating your phone's software to the latest version. Sometimes, software updates include fixes for known bugs and issues, so it's always a good idea to keep your phone up to date.
If updating your phone's software doesn't work, you can try installing System WebView manually. You can download the APK file from a trusted source such as APKMirror or APKPure. Once you've downloaded the file, simply install it on your phone. This should update the System WebView app to the latest version.
If you're still experiencing issues after updating System WebView, you can try clearing the cache and data of the app. To do this, go to Settings > Apps > All Apps > System WebView > Storage > Clear cache and Clear data. This will reset the app to its default settings.
Lastly, you can try disabling any battery optimization settings for System WebView. Sometimes, these settings can interfere with the app's functionality. To do this, go to Settings > Battery > Battery optimization > All apps > System WebView > Don't optimize.
I hope these solutions help you fix the issues you're experiencing with System WebView on your Vivo 1714. If you have any further questions, feel free to ask!