Yes, but if you are using the same batteries, you won't really know, right? It does sound to me like the batteries you are using could be near their useful life.... I guess it could be a loose build fluctuating, but if your resistance is low (lower and more mass than the Baby beast) then your batteries WILL perform differently especially if they are inauthentic or near the end of their useful life, if you are running a higher wattage setup.
I think it would be find to test the tank on another mod (if your batteries are different) but it sounds to me like you could have 3 problems, and you are going to need to find a way to isolate them.
a) possibly a "loose build" could easily check the tank's coils for "looseness' and read again on an ohm's meter.
b) could be something going on with your Alien, the electronics inside
c) could be bad batteries.
I guess play around with things until you get one thing isolated, but I'm not entirely sure what is happening, and I'd say you won't be either until you start some various experiments.
Good luck, I would RULE OUT inauthentic batteries first, IMO, as they're really the "area" in vaping where you can't skimp. For more on battery safety (including reputable suppliers) go here:
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Anna