iPad lower row keys stick or do not type

Is this happening with the touch screen keyboard or a physical keyboard attached to your iPad?

If it is the on-screen keyboard, try turning your iPad upside down so the screen rotates. If the keys still do not work at the very bottom edge of the screen no matter which way you hold it, the touch screen itself might have a dead zone. But if the problem moves along with the letters when you flip the iPad, it is likely a software bug.

Try restarting your iPad first, and make sure to take off any screen protector or thick case just in case it is pressing on the edges and causing touch issues.