There's no particular "issue" here that you can do anything about... it's simply genetics. Relax! She's getting loaded with trichomes and looking pretty good!
Good luck..
Just to precise, I’m not growing autos but photoperiods. This plant preflowered in week 4, went back to veg, stretched and now she is going back in bloom.
No issues at all, except for over feeding with nutrients that I can see.
Flowering in week 4 is to be expected with autos and tri fingered leaves are also to be expected during flowering.