Hello,
I recently started using the extra stops of the KHO, released in January 2009. With the exception of stop 121 and 148, every new stop has its MIDI note number 60 sample not being looped. (Stop 141 does loop on note 60 but with a gap in between.)
You can check this with the onscreen keyboard; (external) MIDI input gives the same result.
The original stops do not seem to suffer from this; I checked quite a few of them.
I have checked all performances parameters and could not find a reason why the sample is not being looped. So I assume this may well be a bug.
Best,
Marius