If you do not have a spawn point selected on the spawn screen, there's a chance you can spawn in a vehicle without selecting it, even if it's blocked by another player and outside the valid spawn range (300M?). I think the yellow highlighted spawn point needs to be blocked, but I am not sure about that. This also does not affect the cooldown for spawning in a vehicle.
Steps to reproduce:
1. Spawn a vehicle with mobile spawn.
3. Do not select a spawn point
4. You will spawn in the vehicle, even if it's blocked.
I have reproduced this bug 1/5.
Results: I am forcefully spawned in a vehicle that is blocked.
Expected Results: I should not spawn in the vehicle.