I'm going to assume that what you hear clicking is the solenoid. Chances are, if the noid is inconsistently clicking/activating that it's either not getting enough power, or it's gunked up with dirt/lube.
Turns out the transfer plate screw above the trigger guard was loose. Quarter turn later, everything was fine.
Not the first time I've seen this with an Axe. Glad you figured it out.