The silent music was done, because Apple allowed apps playing music to stay on in the background, of-course because users usually want their music to continue playing, but FB decided to play silent music and then could stay on up/downloading in the background what the user was doing. You had to force shut it by pushing it up to stop it from running, and of course draining the battery. This reminds me of when Facebook got cought playing silent music, to be able to be always running on after the user left the app. Apple may be planning to release iOS 15.0.1 as soon as this week to patch those issues and others. iOS 15 has been littered with multiple bugs, including one limiting Apple Watch functionality with the just-released iPhone 13, issues with Apple Music, and other bugs that Apple has promised fixes for. While Spotify is being held as the main culprit for the excessive drainage, it could also be a bug in iOS 15 for some users. Those users are advised to update for a possible patch and improved security. While most of the reports are from users running iOS 14.8 and iOS 15.0, there are also other sporadic reports of battery drainage on older iOS versions.

Users reporting the issue on the thread state that Spotify is listed as a consumer of battery life due to background activity, with no clear reason why. Spotify doesn't state when a fix could be coming or whether it would be an app update or other troubleshooting steps. In a long and ongoing support thread on its website, which started weeks ago, Spotify says it is aware of battery drain reports and that it has passed those reports onto its technical iOS team. Following a flood of reports and complaints, Spotify has acknowledged that its app may be causing excessive battery drain and overheating issues on iOS 14.8 and the latest iOS 15 update, promising a fix in the not-so-distant future.

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