it's because your NPK ratios were off, when you added the flowering nutes it triggered flowering, but you're still not there yet. See the dark green , shiny leafs? that means too much N, try just adding additives, then switch to only flowering nutes. in the future you're better off with a lot less feeding, i dont even feed for the first 3-4 weeks, then a bit before you want to flower start direct with flowering nutrients. hope this helps ! 🚀