I realize the pictures may not give you enough to go on to make a quick judgement.
White Widow, 1 full week of veg, Fox Farm Ocean Forest Soil, PH was pushing 7 after last watering. Since that watering I have determined that my water is PH 7.8 ish. (depends on how long ago it rained.)
I just noticed this morning, don’t remember seeing anything last night. This is the only plant with any problems that I can see.
My guess is it has to do with the PH, or the little gnats that have been showing up.