Lua: teleport onGround only works for actors

this works: p=world.players[1]; p:teleport(p.cell, util.vector3(-18603.71484375, -15808.548828125, 422.684417724609375),{onGround=true})

but when you try to do it with any object: world.createObject("misc_com_bottle_01", 1):teleport(world.players[1].cell, util.vector3(-18603.71484375, -15808.548828125, 422.684417724609375),{onGround=true})

it won't.