Copy and paste

A forced-restart of your iPad may be helpful - as doing so will often resolve an unexpected or isolated issue:

• On an iPad with a Home button: Press and hold the top button and the Home button at the same time. When the Apple logo appears, release both buttons.
• On an iPad with Face ID: Press and quickly release the volume up button, press and quickly release the volume down button, then press and hold the top button. When the Apple logo appears, release the button.

I suggest that you reset your iPad Settings:

Settings > General > Reset > Reset All Settings

This reset should not erase an locally stored data.