Seventeen's The8
Seventeen's The8 Twitter

Korean boy band Seventeen's promotional activities have taken a toll on one of its members.

Seventeen's agency Pledis Entertainment issued a statement to say that The8 will stop his activities temporarily because of back pain.

"Currently, The8 is experiencing difficulty in sitting down for a long time due to a backache. He has been continuing promotions on music shows and others as he expressed strong desires for the 2nd album. However, starting with the upcoming fan sign event that requires a long time, he plans to take a break for a while without excessively continuing promotions," the agency stated.

Pledis added The8 "will not be participating in the fan signing tomorrow [November 11] but will only appear on stage for the greetings." The remaining 12 members will continue to promote in the meantime.

Seventeen made their comeback on November 6 with a new album titled "Teen.Age," containing the carrier single "Clap."

Before the release of the new album, Seventeen was embroiled in a plagiarism issue regarding the song "Don't Wanna Cry," the lead single in the group's album "AI1."

The plagiarism accusation heightened when Pledis Entertainment decided to give copyright credit to The Chainsmokers and Coldplay.

It added The Chainsmokers' Andrew Taggart and Coldplay's Guy Berryman, Jonathan Buckland, William Champion and John Anthony Christopher Martin as the song's producers.

"We received inquiries about the similarity of some of the melodies between the songs from the two publishing parties," the agency said.

It added, "We are asserting that 'Don't Wanna Cry' is an independently created song but we were worried that the artists would suffer a great amount of stress if it came to legal disputes and that their image might adversely be affected regardless of the truth. Because of the listed reasons above, we decided to grant/acknowledge a piece of copyright to them."