bud not smelling

Hi everyone, Third week in 12/12 hour flowering, Dinafem Critical 2.0 seeds using Spiderfarmer 4000 in a 1.5x1.5m tent. The past 7-10, the top leaves are changed dramatically, see photos. buds are growing fine but lack any smell. I have 3 of the same plant, all looking the same. I thought it...