Leaf Curling - Late Flower

I was waiting to see if anyone else chimes in here, but I’ll try to help ya out. I checked out your diary and I see your ppm 300, this is low for this stage, but you just flushed and stopped feeding so I get that. Humidity is 56% so that’s good, are you keeping your fans running at night so the humidity doesn’t jump when lights out? Your ph is 6.2, this is a little high in my opinion for this stage in flowering. I try to drop my ph to 5.8 later in flowering. Check your runoff again as well, I know you flushed but doesn’t hurt to check, should be similar around 5.8 ideally. You also may have been overwatering initially and flushing and flooding the soil would not fix this, hence why the problem may still be happening maybe. I would let it dry out completely and feed a half dose of nutrients next watering if it was me. I haven’t done soil for years now though so I’m kinda rusty. Maybe someone else will chime in and add to the conversation. Cheers 💨