Yeah, while wielding a crystal bow and trying to talk to a npc from a distance won't run/walk to them to talk to them.
however, if you are near the npc by 1 tile while wielding the crystal bow, you can talk to him.
Is this only the crystal bow? Or is it all range weapons? :o
I only tested with the crystal bow, not i'm not too sure.
I've tried this on the 317 client with a Magic Bow and it was the same outcome.