Seems like as soon as you set a cue point in an audiofilein CHOP, it craps out…i,e even resetting all parameters to default make the chop unplayable (no audio, no waveform).
I’ve had to or create a new CHOP or restart Touch…
The file that is default in the Audio File In cues fine for me. I could be specific to a particular file you are using. If you can post that to the Bugs forum with a download link that’d be helpful.