A leaderboard is only worth climbing if the numbers on it mean the same thing for everyone. Two small rules now protect that.
Held keys no longer count
When you hold a key down, the operating system starts repeating it. Those repeats looked like extremely fast typing: raw WPM shot up, and holding the space bar could even push net WPM higher by skipping through words. Key repeats are now ignored. The one exception is backspace, because holding it to clear a mistake is a normal thing to do.
Word lock
Backspace can no longer erase past the last word you typed fully correctly. Finished, correct words are locked in; a word with a mistake in it stays editable, so you can still go back and fix it. This matches how most competitive typing tests behave and stops long backspace runs from rewriting history.
What this means for you
If you type normally, nothing changes. Your results are simply harder to fake, which makes the leaderboard and everyone's progress charts more trustworthy, yours included.
Try it yourself
Open the typing test and see the change for yourself.