On January 11, P Nation made the following announcement regarding rookie boy group TNX member Junhyeok:

"Hello, this is P Nation.

First, we would like to thank fans for their great love and interest in TNX.

This notice is in regard TNX member Chun Junhyeok's future promotions.

Recently, Junhyeok visited a clinic after experiencing symptoms of anxiety brought on by a decrease in stamina. He was advised to obtain plenty of rest to regain peace. Thus, after a lengthy discussion with all of the members of TNX including Junhyeok, and after serious consideration, it has been decided that Junhyeok will focus on his recovery. 

As of today, Junhyeok will halt all of his activities temporarily in order to focus on rest and recuperation.

We will do our best to ensure that Junhyeok recovers quickly so that he can return to promotions healthy.

We apologize for causing fans concerns with the sudden news, and ask that you continue to encourage and support TNX."

As a result, TNX will promote as a 5-member group for the time being during Junhyeok's hiatus.