I remember it has to do with that :

Content in a recorder buffer is not automatically saved. If a recorder buffer contains a sam- ple and the corresponding track recorder starts to sample the original buffer sample will be overwritten by the new sample. Also, samples in the recorder buffers are not retained in memory after switching off the Octatrack or changing projects. If you want to keep recorder buffer samples they need to be saved to the Compact Flash card. This operation is per- formed in the audio editor and is covered in the section “OPERATIONS” on page 62.

To make it simple, the buffer isn’t saved. :alien: