On June 3, Woollim Entertainment announced, "Mijoo was diagnosed with an ankle ligament injury at the hospital. In order to focus on her treatment, she'll be missing out on performances this week. The other 7 members will have to re-organize their choreography."
Despite hurting her ankle on stage, Mijoo is said to have finished the performance before getting help from her manager when leaving. The moment she injured herself did not air.
Hopefully, she recovers soon!