I am unaware of what is going on, but here's the deal:
Whenever I try to text Scarlett during the evening, the game seems to bug out, it sends me to a whole different conversation with a random character, and no texting is done at all.
I tried to see if this was just a one time thing, but it kept happening, and because of this I cannot get the Scarlett CG.
I'm not sure if this happens at this specific point of the game, or if it'll keep happening till the end. (I just tamed Vex)