Will try this soonest.

In that case the suspend button shouldn't be available for currently running renders (as it doesn't do anything).

And it should be possible to add a job to the queue in suspended state from within Poser.

Currently when starting the Queue Manager it will begin some rendering job (although nothing is actually queued). As far as I can tell it's the last render job executed within Poser. This is clearly a bug. It doesn't do this when it is started by Poser when a new job is queued.