screen turns off when replying from notifications

Hello Carmenush,

If you are experiencing issues while using WhatsApp, let 's follow the steps below which can help:

"1.Close and reopen the app

Force the app to close. Then open the app to see if it works as expected.

2.Restart your device

Restart your iPhone or restart your iPad. Then open the app to see if it works as expected.

3.Check for updates

To see if updates are available for the app, open the App Store, tap your profile icon, then scroll down to see if updates are available. If updates aren't available for the app, update the software on your iPhone or iPad.

4.Delete the app, then redownload it

Delete the app. When you do this, you might lose data that was stored in the app. Then redownload the app. Then check to see if the problem with the app is fixed.

Get more help

• If the App Store itself is not responding, contact Apple Support for your iPhone or for your iPad.
• If you found the app on the App Store, contact the app developer. If the app is made by Apple or came with your iPhone or iPad, contact Apple Support for your iPhone or for your iPad.
• If you bought the app recently and you no longer want it, you can also request a refund.

 "

If an app on your iPhone or iPad stops responding, closes unexpectedly, or won’t open - Apple Support

Cheers.