I suspect it's the pied split showing itself. Whiteface splits may show themselves in a whitish rim along the outer edge of the face mask. In mature males anyway - I'm not sure whether females and juveniles show a WF split at all.

This is Buster. He has provided proof that he's split to whiteface, in the form of six whiteface babies:

 

Buster is an excellent example of a split to WF! He also looks like he was a pearl or split to pearl.

With females sometimes the cheek patches would be oblong instead of round.

Solace as to the white behind the crest, is she molting, and are they normal appearing feathers or fluffy down type feathers?

 

Solace as to the white behind the crest, is she molting, and are they normal appearing feathers or fluffy down type feathers?

She’s not molting, and the feathers are just normal feathers. It’s a patch of white at the moment, but when I go and pick her up from the Avian Vets today, I’ll check again.

 

He also looks like he was a pearl or split to pearl.

He already had his mature plumage when I got him. All his daughters are either cinnamon or lutino. The cinnamons are definitely not pearl, and I don't particularly trust my eyes but I don't think the lutino girls are pearl either. But I have had several "spot gene" chicks and maybe they're ALL spot gene chicks. Mom definitely has the gene and I suspect that Dad might have it too. Males lose their spots when they mature - I've seen it happen twice now.

 

But I have had several "spot gene" chicks and maybe they're ALL spot gene chicks. Mom definitely has the gene and I suspect that Dad might have it too. Males lose their spots when they mature - I've seen it happen twice now.
-----------------------

Hmmm that is interesting. His marking on his back look like pearl, but might be something different and related to your spot gene. Which also make me wonder if it is also a recessive gene.

 

A bit late but this is the best I could get

 

Has she been outside in the sun alot? If so, the mottling on her back looks like she is photo-sensitive to the sun. That will change as she molts. As to the split pied marks they can vary from almost white to a deep yellow.

 

Nah, not lately - but she was out in the sun a lot before she was sick, so probably something to do with that. Thanks.