Ear markings in inner ear??

[Cherbear]

I’m not an experienced breeder so sorry if my question is dull but what are these markings? They are in both ears but only on the inside. None of the other 6 kits have it. Is this maybe a recessive gene marke?

 

[SableSteel]

That just happens sometimes with brokens. Normally their ears are solid black but sometimes they get white spots inside the ear