At last year's baeksang award, Lee Jieun saw actor Ha Jisung, who has cerebral palsy and is confined to a wheelchair, and helped him to move to a spot which is more visible.
He received an award for a play called Teenage Dick, an adaptation of Shakespeare's Richard III but only starring disabled people. Since all of his co-stars in that play were disabled like him, he did not know any of the people who were invited to the award and out of all only Lee Jieun paid attention to him. He later thanked her in an interview.
Apparently that left a positive impression and later Jang Wonyoung of IVE made news by how she treated a deaf fan.
Lee Jieun might have ignored the actor in a wheelchair but did not, which makes the accusation of her being mean to people with disability moot.