DJM-A9 Roll effect not quantized: drifts out of time

Simply put, the roll effect drifts out of time almost immediately.

It's as though quantize is simply ignored.  It happens even if I don't reassign the effect to an unused channel.  

I've tested with all kinds of tempo and bpm settings (CDJ3000), volume levels  - anything that is adjustable I've tested.  It simply doesn't work.