I think the answer to male/female flowers on Taishu or other cultivars such as Szukis can be defined by climate. It’s a similar thought process I have that when pecans come up here from the south, they can flip their protandry or ours taken there can flip. Plants are adapting to changing environments often.
Is it cold or hot or season length or drought or rain or stress of other kinds; is it uncalculated and the male flowers show up just at times; and at varying climates maybe they don’t show up at all or show up more often.
To understand also that Diospyros virginiana has been observed (and many-many) other hardwoods flipping their sex 3-years after they showed their first flower - is yet another adaptation. Trees are capable of all these things.