Very well could be after the above troubleshooting steps.
The sides with like lines should be matched up, (As shown below).
The side with the button will not register the magnet at all.
It’s actually the battery that the magnet is attracted to.
NERD ALERT: I dissected a V2 sensor to see if there was some sort of lever in there… Was think that maybe if you gave the sensor a rap ( and no not busting a rhyme, but a tap) it would unlock something. Not the case… I’ll post the dissection pics in another thread for those interested.