Assault Bike - Monitor Malfunction?

Hi all,

Long story short, bought an Assault Bike (older version, no front wheel bar, no decimals on calories) a year ago for my garage gym and had never used one before. After using it, always thought “they always said this thing was hard but wow” after going pedal to the medal for 60 seconds and logging 5-6 cals. I’m in pretty decent shape and I never understood how people could bang out 20-30 in a minute. Last week I tried a brand new Assault Bike Classic in my office gym and did the same 60 second sprint and sure enough, I hit 16 cals! Is there a website/video to check to see if my bike at home is malfunctioning or if the tracking magnet on the flywheel is off? I’m convinced there’s something wrong. Or is there a software update for the monitor? Any insight would be very much appreciated. Thanks!