I have a geek vape/Regis Mod, 80 watt...the kind where you just plug in to charge. After changing coil after I vape and let it set a bit the when I try to vape the screen says..no screen? Old? New? and numbers for previous coil and new coil. I just don't understand why this happens. If I push the left bottom button to turn heat up it down ut displays that message quite often.