Mainline strawberry kush

Starting week six of flower. I have given her a random flush and reset of the nutrients. She is becoming very leafy so may remove some bio mass as I've recently had some budrot and until the rh drops I'm going to be over cautious. I have noticed something very strange, something I've never come across before. The canopy is very level but 6 out of the 8 mainlined tops are sort of like splitting the tip into two buds. Very odd. I have grown this strain many times too. I'll put it in the questions and see if anyone sheds some light. I am adding botanicare sweet grape for a magnesium and sulfur boost. I read somewhere that week six is a good time to give me some sulfur. I know TA Ripen is a 0-5-4 with a good dose of sulfur, 5% off the top of my head which I will use in week 7 and/or 8 An answer to my question that I am adopting is something called fasciation I think. Like fused stems. Might not be tho. Coming to the end of week 6 now and week 7 feed will change. I will stick with the silica, sweet grape (magsul) , ruby ful, and power buds. I have already cut out the calmag and this week will see me stop using big bud and novamax bloom. In place of the novamax and big bud I'm going to try Terra Aquatica Ripen. So no nitrogen at all from now