This IG Live convo between the two rappers went down sometime last year, and for whatever reason ... it popped up on social media again this weekend, with folks criticizing both her and the Bay Area legend for many perceived as pitting biracial Black people against those who are 100% Black.

In the clip, you hear Short say that he loves biracial women ... and that he's never fallen in love with any woman who wasn't mixed. Saweetie -- at that point in the convo -- was just taking it in, without any real pushback in the moment ... and sorta yukking it up with him.

TS goes on to say that biracial babies are also the most beautiful ones, to him at least, and that no biracial baby can be ugly. While he didn't say this, per se ... the assumption is that other babies, perhaps, of one race or ethnicity could be less than cute, in his eyes.

It's worth noting ... the reason they got to talking about this in the first place is because Saweetie herself is half Black/half Filipino -- and she's also from NorCal, which they noted is pretty diverse, especially among the Asian community.

Despite that context, some felt Saweetie's reaction here -- in this particular moment -- was less than supportive of Black women, and many are even calling it anti-Black ... which she was apparently perpetuating by not speaking out against Short. She did, though ... just later.

Saweetie posted another clip from that same IG chat, and sure enough ... she notes to Too Short that Black women are beautiful babies, and do indeed make beautiful babies as well.