Why is the first row oversized and sliding back and forth with keys sliding off screen. Hitting letters on this moving row is like a carnival game. Is that intentional or a bug on my Pro Max phone?

Hi! Thanks for trying it. The "slow sway" is part of the plan! It's so the oversized first row of a qwerty keyboard can show all possible letters on the top row. If it feels too much like a game, slow it down using the main app from your home screen.