I didn’t have the default rule set added, just dogs whitelisted, which is why it stopped working for me. I got so used to not using it that I think I need to add a bunch of stuff to the whitelist that aren’t so dangerous and keep the more dangerous things default so that it pauses.
You can also set how far away it activates in the game’s options. I used to dislike when it would stop me for enemies really far away, so I set it to 35, which I found was a good distance, but I’ll have to keep playing with it to see if I still like that. That’s also why I added dogs, because you tend to see a lot of packs of dogs off in the distance, but usually are able to handle them with a half decent character.