Thats it.

Not a bug, or rather is, but not with my mod. Minecarts use really janky interpolation that Mojang has never bothered to fix. If you were to have placed a block instead of a player there, the minecart would've stopped before it ever touched the block.

Sometimes just stops right in front of player or passing it and keep rolling away.
Gotcha.

Again, issue with vanilla's interpolation of minecarts. No one ever uses them though, so most people don't even know it's a problem. Isn't helped by the fact I'm making them move 5 times faster than they normally could though. Makes the issues more pronounced.