VastPark developer zone

Hi, I'm facing a problem with changing the active camera once the space is loaded. My space contains 2 cameras:

<Camera Name="MainCamera" Enabled="False" FOV="60" ChaseDamping="60" ChaseStiffness="100" ChaseMass="5" Projection="Perspective" Position="0.4816188,1,0.3509535"/>
and
<Camera Name="camLoad" Enabled="False" FOV="60" ChaseDamping="60" ChaseStiffness="100" ChaseMass="5" Projection="Perspective" Rotation="0,6.275654,0" Position="2.458149,0.022083,-52.218924" />

'camLoad' is positioned in front of a primitive that acts as a loading screen, so once the space is loaded, I want to switch the active camera to 'MainCamera'. I've added a trigger that calls a LUA script that changes the camera:

<Trigger Event="Loaded" Target="SetCameraPos" />

<Script Name="SetCameraPos">
function main(obj, args)
--this calls a function in a plugin that adjusts the position of 'MainCamera'
komanager:SetCameraPosition()

scene.document.camera = 'MainCamera'

--the lines below hide the loading screen primitive.
    scene:remove('LightLoad')
    scene:remove('txtLoading')
    scene:remove('boxLoadScreen')

scene.ui:writeline('Cam changed.')
  end
</Script>

The problem is that sometimes, when the space is loaded in the player, the view remains at the loading screen's (camLoad's) position even though the loading screen primitives are hidden. The line "Cam changed" appears in the debug window, indicating the LUA script was executed. Strangely, if I turn free look mode on and then off, the view jumps to the correct position (from MainCamera's perspective).
This problem tends to occur erratically - sometimes the camera changes without problems. Is there a bug that may be causing this issue, or is there any other way I can switch cameras that would not cause this problem?

Thanks for any insight into this!