Hi there. You have to manually release the vacuum brake from each freight car that has it. It's like a bug where it won't do that automatically. So you have to do it manually for now until they update it like they said they would.
Ah I've found it, thanks alot. Here's a video of how to release the vacuum brakes on the red covered wagons.
where exactly is the lever or the valve to release the brakes on the wagon? I can't find any valve or lever on the coal wagons
Unfortunately there is no video attached, maybe you can just write the name here and i'll look for it on youtube.
The brake release cords are only on certain wagons. The mineral wagons don't have any. The ones that hold the planks have a white cord you pull to release. Put it into release for about 10 seconds. From the right side, it's gonna be towards the back and front in alternation. So in 1 wagon, it will be at the front. The next wagon will be towards the back.