Mine had the same, so I exchanged it for another. First one was very iffy, and missing more shots than registering them. The second one is 100% OK. (Of course I tried all sorts of positions, alignments and multiple airguns, but it clearly was the unit itself and not the circumstances)
The only difference between them that I noticed was that the ‘faulty’ one had the small red and green LEDs (on the opposite side from where the on/off button is) only illuminated for a short time (when pressing the on/off button momentarily), where the 100% one has them illuminated full time. Don’t know if it related to their functionality, but their you have it.
Well that and the fact that the first one had the nut stuck on the screw, so it required a lot of force to break free (literally broke the screw in two pieces!) and it ruined the pristine finish of my 2500 dollar airgun. I call it ”The revenge of FX”. (As the airgun is not from that make)
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