She'd created her account a while back but hadn't posted for over 10 weeks. It turns out that she hadn't posted because she forgot her Instagram password! She posted the selca below and wrote, "I remembered the password that I forgot kekeke ♥".
However, a few hours after she made her post, she's deleted all her photos and even her profile photo, minus the one where she promoted Juniel's song. She hasn't given an explanation on why.
You can follow ChoA at her Instagram here! Hopefully she doesn't forget her password again.