Yeah sounds sensible man! Just give her water for the next few, it only appeared after I added a little grow nute about a week or so ago, before that the top was perfectly rounded! I had a leaf yellowing issue that’s why I added the N.there seems to be a temp/humidity/light/watering issue , and something dumb is mutilating your leaves plants hate that.
i dont see an N issue, and flushing cleans the substrate not the plant, and it
kills beneficial microbes, and throws ph off , you could skip a feeding or two if concerned