Muted Flavor TFV8

Hello all, I've been using the Baby Beast and Big Baby Beast for a few weeks now with T6 coils. Everything has been amazing until two days ago it all of a sudden started giving a muted taste. Hardly any flavor and was not burnt. Tried a brand new T6 coil, same thing; brand new X4, same thing. This is on an Alien 220W and I'm at a dead end. Does anyone have a fix for this?