While a queue is stopped, the "Pause" option of the Queue Action action will toggle the paused status of said queue, leading to the "Start" option not actually running the queue, but instead moving it from "Stopped" to "Paused" status without executing any commands in it.
Is this by design?
Using the "Start" option on a paused queue displays "Queue [] already started", and the queue remains paused.
I'm comparing this to a media player, as this is the most familiar queuing system to me, where pressing pause will pause, pressing pause again will play, but pressing play while paused will also play. Pressing pause when stopped does nothing.
EDIT: All items covered fixed or implemented in v1.7.2.16