Good that you washed it yesterday;) it’s good for coco to be flushed right before flowering to wash out the excess of Nitrogen, if you don’t change NPK gradually within 2 weeks before flipping to 12/12. The labels can’t be messed up so easily, it’s a serious issue that could lead to a massive money and reputation loss for the company. The whole batch would have the labels messed then.
Have you checked for sediments in both parts of your fertiliser? It can seriously affect NPK of the solution, and cause weird toxicity/deficiency issues while being fed “properly”. I’ve had an issue with that, you can find it in my diary. Overall your plant looks fine. I’ve had the same claw in my coco grow, which disappeared as soon as I defoliated those leaves lol. Just a joke;) She’ll be fine in few days I guess if you feed her proper NPK. No matter if it’s fem or auto.