I can guarantee that 9 times out of 10 it's because you have the wattage so high... I'm running .19 dual coils that I built and I don't run them no more than 80 watts
Tried it on different watt levels. 37, 45, 50, 80, 65. All the same. Believe it’s the coil.
I usually use 65-80 on my 110w coil (bad one).