ragged pattern on paph leaf texture

[PuiPuiMolcar]

Hello, remember the Paphiopedilum godefroyae var. Leuchochilum I ordered and came with almost to root last year? It's doing well and is making 2 pups.
Except for this one pattern that I can't understand. The leaf would get this ragged texture as it get older. Is it a nutrient problem, like lack of calcium? I've check it through and through with my magnifying glass for pest, and I am sure that's not it.