I wish I could be of more help. Hopefully a jubilee genetics expert will chime in. Are jubilee wheaten based? The incomplete stripes on your babies makes me think of a pattern gene but then it could be wild type e allele combined with a dilution gene, but then again a dilution gene would be cancelled by mahogany. Buff with a pattern gene perhaps?
I don't know the answer to any of those questions yet. These chicks were a surprise! We are excited to work with this very beautiful breed. I will be honest and say I don't really know much of anything about it yet.