ok so pandemic sucks and has kept me busy but have managed to keep up with plants just not posting. I have had a couple leaves yellow but seems to be normal for a couple to do so during flowering
the buds are looking good and trichomes are all super clear still and still forming more every day
I saw a message of yours in another diary,about smell. burning incense would help,in another room of course. or there is something called ONA Gel if you were interested in.
Looks a little over watered! Look up over watering symptoms you'll see! That could explain a few of the issues you mentioned!
What's your pot size?
Are you using a EC/PPM/TDS meter?