TNT Minecart moves indefinitely without rail

I was messing around with sculk sensors (explosions, as usual), when I discovered something weird. When I stack at least 3 TNT minecarts on the same powered rail, with a block on one side of the rail, and power the rail, the minecarts get stuck moving forward until they collide. I tried this with a sculk sensor and a button, and it happened. It also kept playing the sound for a minecart moving on rail until it collided, even when the minecart was falling.