Yes, it happens with KR808 cartomizers and with all cartomizers to some extent.
Do you use a drip tip? You really must look into using one (pop off the white mouthpiece and replace with a drip tip).
Glycerin high juice will give more vapor with less throat hit and less flavor. To get more vapor and stronger hit, you'll need to increase the power output. To do so, unfortunately, you need a larger battery that can use lower resistance cartomizers or use a variable / higher voltage device.