So on my 3rd refill of a CE3, I noticed that after I took a vape an air bubble or two would come out of one or both of the holes at the bottom (where the wick or whatever is). I also noticed a slight dry taste, presumably from the air bubble. So I decided to fill up a new CE3, and I'm still getting air bubbles from the bottom, but no dry taste. Is this normal? Did I mess up filling these somehow?