Fans noticed that "Cypher Pt 4" on the album had the same instrumental in parts to a Dutch group SFB's "Strangers", which was released in 2015. However, it's now turned out that the track was used without the producer knowing. Tricky Stewart posted the following on his Twitter, absolving BTS and Big Hit Entertainment:
Big Hit Entertainment also posted a statement, writing:
Hello, this is Big Hit Entertainment.
As explained in the album introductions, the track "BTS Cypher 4" in the 'WINGS' album released on the 10th was produced together with USA's producer Tricky Stewart.
However, on the 11th after the release, we were contacted by Tricky Stewart where we were told that a rough version of the track had been used by a band in the Netherlands in a song released in 2015.
This happened because of a mistake and and ignorance from one of the staff on Tricky's side. Tricky Stewart also did not learn of this fact until right after BTS' album was released, so he could not let us know until after the release.
However, Tricky Stewart and his management has acknowledged all fault as one of the producers, and promised to solve the issue in a way that would not harm BTS.
BTS has no fault or responsibility in any issue surrounding the track - in fact, they are the victims of the situation. Because of this, Big Hit Entertainment asked Tricky Stewart to issue an official apology for BTS and all BTS fans worldwide.
It's a good thing the situation was cleared up so quickly!