Number pickup takes the number of vehicles and the number of pickup number of vehicles is a bug function
(https://forum.vc-mp.org/proxy.php?request=http%3A%2F%2Fwww.iv.pl%2Fimages%2F19876596743199957216.jpg&hash=dd5e21c15a805c0189131e07c36dde10347bc298)
You can check this bug by doing the timer function get
NewTimer( "get" 1000, 0 );
function get()
{
print( "Vehicles: " + GetVehicleCount() );
print( "Pickups: " + GetPickupCount() );
}
Fixed in git. Not on a PC that can compile atm.