I see you have been removing leaves, this could be a reason, particularly if you are feeding high potash as leaves play a large part in getting the feed to the fruit! (Photosynthesis)
It's the potash that has more effect on ripening than light.
Think of it this way; one way of ripening harvested tomatoes is to keep them in a darkened state, e.g a drawer!
Leaves offer this shade as well as feeding the fruit!