There's no such option.
If the unit is buffering, you should note if it happens with only the higher bitrate states. Try connecting your soundbridge wired, if possible, and test if it still happens.
It could be a weaker wireless signal that's the cause of the problem. You can try moving the soundbridge closer to your router. If that improves things, try changing which wireless channel the router is set to. That may improve performance.
Is this a new problem, or has this always occurred?