When I visit an old town like the starter town, I can never find any monsters outside of it. It’s annoying when I’m trying to find all the rare ones that can only be found in the beginning.
Not sure about this but this could be it :
You’re saying that fights don’t auto launch when you go on a spot near an old town
I think it’s due to the fact that if your arcs are too high level you won’t get attacked by wild monsters…
However if you tap on the spot you are already on you can always fight wild arcs without them wanting too…
Don’t know if that’s how it works but certainly feels that way !
Hope this was clear enough
zyphlan is right just tap the tile you are on to battle wild arcs