Hi Jamie,
I'm Sumit, here to answer your query at the Microsoft Community.
Sounds like a keyboard issue.
• Press Win+I Keys to open Settings.
• Go to System>Troubleshoot menu.
• Look for Keyboard trouble-shooter. Run it and see if it finds issues.
• When done, restart to see if the problem is resolved.
If that does not help,
• Right click Start.
• Choose Device Manager
• Expand Keyboard.
• Right click the keyboard
• Select Uninstall
• Restart your computer.
• If it is a wired keyboard, try connecting it to a different USB port or another computer.
• If it is a laptop Keyboard, try connecting a spare keyboard to isolate if it is a hardware problem.
You can test your keyboard using keyboard tester website.
• Also make sure the chipset and BIOS is updated.
Hope that helps, and rely on us for any further inquiries. All the best.