I have put this in my grow journal, but not really had any input. I have two plants in identical soil, identical light and all other conditions. One has normal leaves, one has yellow verigations, but not the brown spots I see in other posts.
The plant seems healthy otherwise and is outgrowing all others in the tent.
It is desirable in some foliage type plants like English Ivy. This plant is called “Devil’s Backbone” due to it looks like a very crooked spine. It normally has the variegation to the extreme. Sometimes the variegation is not present and it makes for a dull. ordinary looking plant.