Copy and paste keeps breaking on my iPad

All models of iPad Pro and your iPhone SE2 are both capable of update to iOS/iPadOS 16.6. As you have iOS/iPadOS 14.7.1 installed, you should update both to the current version.

These support pages outline both the available methods by which the update can be performed - and troubleshooting should you experience difficulties:

Update your iPhone, iPad or iPod touch – Apple Support

If you can't update or restore your iPhone, iPad or iPod touch – Apple Support

If your iPhone, iPad or iPod touch won’t update - Apple Support

iOS update and restore errors – Apple Support

Be aware that while your devices are capable of update, given that they are so far behind the current version, you may need to use a computer to perform the update. To do so, you will need access to either a Windows PC (with iTunes for Windows installed) or a Mac (with iTunes or Finder - as appropriate for the installed version of MacOS). Ensure that your installed version of iTunes has been updated to the most recent version; the essential device drivers are included.

Download and use iTunes for Windows – Apple Support

Update to the latest version of iTunes – Apple Support

Update software on iPhone, iPad or iPod touch in iTunes on PC - Apple Support

Update your iPhone, iPad, or iPod touch with the Finder - Apple Support

If you have a beta profile installed, ensure this has been removed from your iPad/iPhone - as, otherwise, installation of production software updates may be inhibited. This support page provides the necessary information to remove the beta from your iPad:

How to uninstall iOS beta software - Apple Support

You should note that to install an available update, the device battery must be charged to at least 50% capacity - and/or be connected to its Power Adapter.

Keeping your iPad updated will help to ensure that known functional issues are fixed - as well as ensuring that emerging security vulnerabilities and active exploits are patched.

Your issue may have been resolved years ago. Unless you update, you'll never know. If you seek assistance from Apple Support, diagnostics will require that you update to a supported version of iPadOS.

Ultimately, it's your choice - but if you a wedded to an unsupported version of iOS/iPadOS, you can expect to encounter unresolvable difficulties.

Nobody is forcing you to do anything. You are free to exercise personal choice and not update your devices that are capable - however, in so doing, you must accept that it may not be possible to resolve a problem.

At this time, I've no other suggestions for addressing the issue that you have described.

This happens to me on my phone. I tried restarting, I’m on the current OS. I’m on the iPhone 11 Pro Max. And this happens whenever I try to use the spacebar to drag my cursor , try to click into a mistyped word before I hit send and many other cases. I tried resetting the dictionary and ensuring I have plenty of space. Many apps have this issue. Also today, I tried calling something but the button didn’t work. I meant to type someone but didn’t bother to try to correct it because I know it will freeze this keyboard. Help!