1 Slice a sample in Pads/Layers form and extract to pads.
2 Play one pad. You should now be under the pads/layers form.
3 Zoom into the waveform by hitting the + key.
4 Adjust the length of the sample by clicking one of the points/square handles around the edge of the sample waveform.
5 Play the sample
6 Now press undo button
Zoom level stays the same
Zoom level resets.
(Same issue when pressing redo BTW).