I've had a Vivi Nova for about 6 months now and have it on the MVP2. I switched from BDC coils to BVC and it was working fine for the first couple coils, but now every single coil I put in tastes completely burnt. I've dropped the wattage as low as it goes to see if the mvp was burning them, but even that low they are tasting burnt. The coils are genuine, and everything is working fine with the vape itself. I'm using 18mg 50/50 juice and before that I was on 24mg and there was no burning. Is there something obvious I'm missing here? I'm lost.