Hello,
Without diving to deep into Mendel laws of Inheritance, sometimes you can get an unstable phenotype where the traits aren’t locked correctly by the breeders. In your case, the ruderalis traits of this phenotype aren’t locked correctly and this is why it isn’t flowering correctly like the others.
It requires years of studies in genetic engineering to understand the laws of inheritance and being able to manipulate them correctly. Technically, when these people gets their grad, they work for a vaccine lab or any other thing than breeding Cannabis plants 😊