Minecart wobbles perpetually on activator rail

On my ps4 world I have been working to make a double blaze spawner machine that transports the blazes via minecart. Before carts would hit the activator rail bobble and then slide back down on the track. Now, no matter what, the cart just sits there and wobbles back and forth constantly. It does this on flat ground on a hill every way I try to place it. It just wobbles.