I always have a problem with a '2 beat bar' in Randy Crawford's 'Streetlife' which is awkward to get out of as it comes when there is a lot of keyboard parts to cover, its a scramble to hit the sync start/stop button, lift off the keys in a split second and restart on the beat again without a glitch...there also a 2 beat bar in 'The Look of Love'
Even the singers I work with sometimes slip 2 beats, so they're singing on the 3rd beat as if it was the first beat of the bar...a terrible mess...so come on Yamaha take note! Roland have had a '1st beat reset' button for years, sadly the problem continues on the TY2.