Why are you dealing a d6 with another d6?
Sneak attack.
Maybe Sneak Attack just does not work. (Btw 1d6 is wrong, too, since sneak attack at level 3 should deal 2d6 extra damage, but that is another thing)
However, it seems that all my ranged attacks consistently deal minimum damage or less.
IMO the goblin encounters are rediculously difficult, just because it seems the max damage roll on a d8 seems to be a 2.
Until that incident I thought that it just was bad luck. But since I am not aware that the typical d6 is able to roll a 0 I started to think it is a bug.
Maybe I will wait for a difficulty setting, where you can switch from "classic" which seems to mean "remotely inspired by D&D rules" to "D&D original"...