It clearly lacks of pink light. It's just the unnaturally green one with problems.

Did you splash any fertilizers on that leaf??

Hey growmie, Looks like minor early damage — maybe a tiny pest, or leaf rubbed the soil. Nothing active now, new growth looks clean. 👀 Keep an eye under leaves Keep the top layer tidy 🌱 She’ll outgrow it easy ps no diary, so that’s the best read from the pic!