Leaves don’t look quite right.

Looks like your substrate ph is off and you are getting some lock out issues.

I believe you're over feeding a bit for an auto. Also you're using pro mix soil. I do as well. Make sure you don't ph your water before you apply when using ProMix because of the dolomite limestone it has in it will through your medium out of wack. It's meant to correct it's ph on it's own. Your ph seems fine but ppm at 600 in the first week of flower is intense for an auto. That's the most I e seen an auto pushed personally and that's in late bloom. I would dial back to half that growmie. Hope this helps.

Plants need to feed more during the stretch. They need a balanced feeding program at that time. The tips bending is from an unbalanced pH going on in the root zone.

paling tip-in, bottom-up == nitrogen deficiency. not 100% what's goin on on middle leaves. maybe watering too frequently? promix, so should be finding a well-balanced mix at 1.3-1.5 ec give or take even more possible... 10% runoff every fertigation. safest is to wait for top layer to dry before repeating. more frequent irrigation requires right drainage properties, and sized plant+pot so it can drink fast enough to warrant it.