Both of my EHPro KFL+ clones work great, but I've noticed that after I take a pull and set down my mod, there's a small trail of vapor that leaks from the air inlet hole for a moment. I imagine that it's just leftover vapor produced while the coil cools down, and it travels down the airhole underneath the coil and out the air inlet. It's not really an issue, but I was wondering if this is normal?