The group was on an MTV show, and they sang a version of "Let It Go," rearranged by B.I. and originally performed for Mnet's survival program 'Mix & Match.'
Though the group's performance of this version aired about a month ago, netizens took notice more recently. Under the video clip of the performance, they wrote:
"Hanbin work hard remake this song! Why don't give credit to Hanbin? [sic]"
"A complete plagiarism of the Mix&match version, completely shameless."
"B.I work so so hard for this song!!! give credit to him !!"
"What the hell? this was just a copy and paste. Woah I'm angry rn. Think about how hard Hanbin worked to produce the song and this trio comes up and steals it. shame on you. [sic]"
"i came here thinking they'd only use the same music arrangement but everything is exactly the same even the adlibs？？wow i see zero creativity here the fact that the only thing they did was change the lyrics to chinese, there isn't even a bit of originality in it, not even the way they sing it. all the hard work hanbin did for this song can't even deserve a credit here? [sic]" and many more comments which expressed similar sentiments.
You can compare the performances for yourself by watching the clips provided and share your opinion on the matter.