The Mini Bike doesn't render when placed on the jack block, all the other vehicles work just fine. And also the jack is easily broken with just one left click.
And sometimes when i hit a mob the car just vanishes. For example I hit a horse with the off roader and the off roader vanished. I was with a player in the vehicle when that happened.
Hopefully you can look into this. Thanks!

Fixed in 59df3dd