Light new growth with rolled under leafs

[Dicco7]

7 days into flower and all my plants are doing the same thing rolling leafs on new bud growth and light colour, it's not just the top of the plant but all over on new bud sight. Plant other wise looks good. Growing in coco and my ph run of is 6.0 in most and 6.2 in 2 of them ran 0.4ec thru which came back at 1.0 ec in run of always do light flush every 3rd feed.i did hear that they do go light green in first 2 weeks of flower as they grow fast but never seen anything bout leaf rolling under with it anyone have any ideas please. Pictures are attached