Today I went out to wash my lines. I found a hole that was pretty small and had sap running down form it. I could see a insect was in it but I destroyed it trying to dig it out to identify what insect it could be. It wasn't a woodpecker because it was a clean bored hole. It wasn't a D shaped hole. It was way to small for the drill bit. And I kept a eye on all the others and haven't found anymore of this insect. I haven't heard anyone with this problem in my area.