Hi Ive been looking into your diary. and saw pictures of a nice growuing plant, with some issues in the past.
now you show us a single leave , that is not bad, but got some spreckles and discolorations.
Well i tend to say., its an oöd damage. you have had PH fluctuations, and then marks show up on the leaves. You ve had a clacium def and Some marks stay.....
Alltoghether your plant looks good, Old "fightingscars"