The kites behavior does look light wind to me. The mic is quite sensitive to the wind though, so it is confusing. I would check how much B is going slack when depowered. The common thing when kites hang in the middle is it is not going slack enough. I had good results massively increasing this on some kites. You need to lengthen everything in ratio though to maintain the profile. It could just be the bar setup in this case, rears did go a bit slack though, so more indicates the mixer or the wind...
Genesis Line Plan 2019