Range igniter acting strange

I inherited this range when I bought the house and don't know about gas ranges. Can't find the manual.
I turn the knobs for the ranges and no matter which one I turn on the igniter on the right front keeps snapping (I can see the spark). All the burners turn on ok, including the one that snaps, but the sparking and snapping won't quit. Any idea what it's doing and how I can fix it?