On July 11, TWICE's management agency JYP Entertainment announced that MINA will be taking a break from activities, including the world tour, to take care of her health.

Hello, this is JYP Entertainment.
We would like to announce in regard to MINA's health condition and status.
MINA is currently struggling with sudden extreme anxiety and insecurity towards performing on stage.
No exact diagnosis has been identified yet, and we are consulting with seveal medical professionals to verify the cause in detail.
After discussing with MINA and other members of TWICE, we have decided that MINA's current condition requires additional treatment, professional measures, and sufficient rest.
Therefore, MINA will not be attending the following schedule―TWICE World Tour 2019 'TWICELIGHTS'.

We ask for the fans' sincere support so that MINA can get well soon. Thank you.

(Credit= JYP Entertainment)
(SBS Star)