Metronome and browser preview audio

[mrvinyl]

Sometimes when I've got a heavy set going on with lots of devices and audio tracks. The Metronome stops working and I can't hear and audio previews of tracks in the browser?

any ideas why this happens, if I open up a new empty set its fine

[invol]

It stops working, as in turns off? Or you simply cannot hear it? There is a volume knob to the left of the Master Volume.

[mrvinyl]

yes turns off, volume knob is left untouched