My game crashed when using the tnt minecart, it seemed to tick faster and faster until I lagged out and crashed.

I expected the TNT mine-cart to explode a while after it hit the activator rail though it stopped a while away and the TNT stayed white and the mine-cart was unbreakable along with the tracks it was on, the ticking noise had kept going though, and sped up. While the TNT mine-cart ticked faster I lagged more and more until my game crashed.