My Caprice started to do this last night. Since I have bought it, I have to do the "Super Slam" when it swings open to get the gate light to go off. Yesterday, the "drop" latch wouldn't really work, so when I tried the "swing" latch, the gate wanted to do both at once! I have it closed now, but I need to sort this out before winter.
I'm going to have to get Diesel Bill to perform some gate magic on it...