Let’s look at the conclusion first

When there is a short pause, the AI will wait and will not move forward on its own; when repeating the current sentence, it usually stays nearby; when you re-read the previous text clearly and continuously, the AI will first preview the possible old position, confirm that it is stable, and then go back to avoid being pulled away by accidental similar words.

Specific performance

Notice

A large number of the same short sentences in the script will increase the difficulty of judgment. When you need to read back, it's best to start with a recognizable, complete sentence; if the target is far away, it's often faster to scroll directly by hand.