I was toying with various freight cars in service mode to solve the mystery of trains not wanting to roll, and aside from applied handbrakes on tank cars and boxcars, I found out that hopper cars behave weirdly. I think they are misconfigured somehow, here's why: - If you look at handbrake handle, it will show as "Released", however, if you click on it, you won't see the animation that supposed to be there, you just hear the sound and it switches to "Applied" After this it operates normally. - Brakes are visually applied on these cars even after you Apply and then Release the brakes. To have brakes released I needed to decouple the rest of the consist from the problematic car and couple it back in. After this procedure, the car functions normally. Centerbeam cars I'm not sure about since their brakes do not visually indicate whether they're applied or released.