Goblins are archers (
https://wiki.project1999.com/A_Deepwater_Goblin). As far as "teleporting" onto you, that's common when mobs get stuck in the world - they're still moving towards you, but they don't look like they are. Then, suddenly they're in melee range so bam your client shows them right on you. Same thing happens with rooted mobs sometimes. You'll root them and they look like they're still running towards you (and then through you and off into the distance) but if you step within melee range of where you rooted them, suddenly there they are.
-Mcoy