I have been exploiting the delay buffer on high feedback - but the issue is that it can’t be cleared with double stop - if you have a few patterns which use different tempos or different lengths, you will soon find that the buffer from way back appears
it is great that the delay stays there, but there ought to be a way to fully clear the buffer (short of dialing the feedback down and waiting a while at 30bpm e.g.)
So it is bugging or buggy rather than a bug, more oversight, but the buffer is tricky to empty and it can lead to unwelcome results (a small chunk of earlier uncleared buffer suddenly pops up)