Can't Select Playback Device Before Playback Commences

[RBZ5416]

Why must I start playback on the phone before I can then select the preferred playback device? In this case an Arcam SR250.

So the choices are to faff about playing something you don't want to listen to, select the correct playback device & then go find what you DO want to listen to.

or

Miss the first few seconds of what you want to listen to, have it start playing on the preferred device & then have to recue the track.

Really annoying to the point of considering cancelling purely because of this.