Pitch bend oddity with large ranges

[jschpmn]

http://www.eigenlabs.com/forum/threads/id/493/

After watching Dave and Aaron's snazzy seminar, I was playing around with the key pitch bend on the Piano sampler, and found an odd problem. Can anyone reproduce this:

sampler 1 scaler hey k bend range to 72 set

then play notes on the piano (they wobble all over the place). If you bend a note down all the way, then up, it can be heard returning to the centre, but if you bend up all the way, the sound cuts out with a sometimes audible click, and then doesn't come back down when you return the key to the center, ie the sound stops when you hit the top. Is there some parameter that isn't being capped correctly and I'm pushing it over the edge?