Thanks for replies. Mark, as I mentioned, this does not work for me. Unchecking the zero controller box has no effect.
ABACAB, I don't know how to access CC data and how to apply a fix once I know the data, so not something I can dive into with a great degree of confidence.
The advice I received from another forum from someone who had a similar problem was to sync the midi channels rather than use omni. This worked. At least it works most of the time. There are other scenarios which I can't quite pin point that collapse the rhythm display even when midi channels are synced. Perhaps not ideal but I can work with it at the moment .