I'm really surprised the team of Showterview didn't change it to "Showterview with Sunmi" instead.
The show was and always will be Jessi's and that seems blatantly disrespectful to keep the same order by the production team "claiming" it is now Sunmi's.
So, either SBS or they did not even have the decency to let Jessi know she'll be replaced, either. A fan alerted her of the news, apparently.
I'm hoping it wasn't the production team who did not notify her since it seemed like they and Jessi had a close professional relationship, when the cameras cut to their reactions during interviews. But, who knows.
And, I've seen Jessi's Instagram reaction clip on YouTube saying she's supportive of Sunmi, wishing her well, and wanted Jessi's fans to be supportive, too.
I also hope fans of both Jessi and Sunmi support Sunmi and not be toxic and crap on her.