boat falls trough ground and breaks leaving the old 2 sticks and 3 planks

So basically me and my friend were playing minecraft and getting some vbillagers going in a villager breeder well i was transporting the villagers as usual and then suddenly started vibrating trough the ground until the boat broke. But im shocked bc it left behind the 2 sticks and 3 planks as in the old version of the boat from probably before 1.9... i have video footage of the thing.