I would think After 5 Minutes that even if you Didn't physically prime it, it would be ok.
But I always Prime a New Coil/Cotton by dripping on it Directly. Then putting the Tank/RTA/RDA/... back together. Might try dripping a few drops of e-Liquid on the a New Coil/Cotton to see it this cures it.
If not, it sounds like some Funky Wire.