cuz YG said their standard response "we have nothing to say". That one time with Jennie and Kai, the confirmation came from SM, YG said "they don't know". YG never confirm any rumours
Plus, Jennie stated several times in magazine interviews that she is single and have been single for a long time.
She lived the single live which was shown through her long stays in amercia and paris
Apparently a staff from YG said back then that the two are companie mates not more
Now the thing with v seem a bit weird too