The one specific line that reveals signet

Okay so apparently RY has said in an interview that she told her publisher she was shocked people haven't figured out Vi second signet, she thought one specific line would give it away. Okay so I've never seen anyone mention this line but it always seemed super out of place to me. When violet is running to the ward stone someone (can't recall who) says "I've never seen you run that fast". They are in the middle of a battle and it seems very out of place. Could she have distance from weilded a tiny bit?

Although I know signets are meant to express need so you would think it old be venin related. But how many times has violet needed to be just a few seconds closer in this book? To save Liam, sawyer, the wardstone, etc.

Thoughts?