I agree, but it could happen at exactly the moment the arms are extended, rather than waiting that extra fraction of a second until just before they retract.
I (like Rex) observe many of the new players struggle with this, and I did too when I first tried to figure out how they worked.
It just doesn’t work as well as it does in other games, isn’t as intuitive as it could be and causes frustration and confusion for both the guy trying to revive and the guy waiting to be revived.