Please follow steps below for troubleshooting：
- Make sure the appearance of keyboard and the force feedback of press keys are intact
- Make sure the keyboard configuration and input method are match with your physical keyboard and input method that you need
- Update firmware to latest version：Settings > About > System update > Check Update
- Access Safe Mode by long pressing power key > tapping and holding Power Off > tapping OK
If your tablet works well in Safe Mode, there may be some 3rd apps that cause malfunction
Please reboot your tablet and check again if it works well - Backup your data and perform factory data reset
