Is this a problem anyone is having or is it me?

Would it be safe to say that its safer not to go near the transposer during a live gig as it does not revert back to zero properly for the next song? It always did go back on my old X1. or X4.
But I have noticed a few times that if I push a song or style up a notch during a gig with the audya and then go on the next SAVED registeration for example, that the transposer has not reverted back and now my new song is playing in the wrong key. Is there something I have not set correctly.

Any info appreciated
Rusty