Sound output bug

Since update (yesterday) I have no sound output from my Pioneer 400 mixer. Tried everything. No problems before update. Is this a bug?

I have run a sound check on amp - all fine
Changed leads - all fine
Tried different apple devices - both have same issue
Sound heard in headphones (PFL)

Any suggestions gratefully received.

Outputs are messed up since possibly this update you mentioned with my A&H Xone 43c as well. Channel selection will not be applied correctly, it outputs all decks on all channels in internal mixer mode and no output at all in external mixer mode.