Our log home is 30 years old. I noticed that below and air conditioner there was a sizable amount of a white/yellow foam seeping from a small hole in a log. It had the stickiness and consistency of spray foam before it dries. Outside were two tiny, oval-shaped holes two logs below the log with the inside seepage. There are no signs of dry powder on the outside or inside. Is this an insect, a fungus, or something else?