Honestly it looks like it could be just a little stress. Probably from the HST of the topping. Overall, the plant looks very healthy so you shouldn’t worry too much.
Hope this helps.
Day 11
🌱: removed 2 leaves, which shaded new branches
💧 : 2l
💡 : dli 45 mol/m²/d
🤔: Topping ahead! Should I be worried about the leaf curling up a little? What do you think?