Maybe the playing platform doesn't have the copyright authorization of the song, so it dare not play it casually. Copyright, also known as copyright, refers to the personal rights and property rights enjoyed by authors and other rights holders in literary, artistic and scientific works.
Copyright should protect the expression of ideas, not the ideas themselves. While protecting the interests of private property rights, we must take into account the accumulation of civilization and the dissemination of knowledge. Algorithms, mathematical methods, technology or machine design are not the objects of copyright protection.