hey Lazlow, yeah you should be concerned, unfortunately. the metabolism of your plants is pretty heavy due to everything being pretty much tuned in, so the plant is making flowers in overdrive mode, and using more Phosphorous (P) than is available, so what you're seeing is P deficiency. to correct this, you can either use a PK booster or increase your bloom nutrients instead of grow nutrients. you want to start feeding this asap. sorry for the bad news, but it's the truth. hope this helps ! 🚀