Thanks for your reports about battery drainage while updating from iOS 14.8 to .15 on both firmware versions during the past days.
We’ve passed your info on to the relevant team and we can confirm they are currently looking into it.
If you’re experiencing this issue, make sure to click +VOTE and Subscribe to the thread to be notified of any developments.
Aside from trying restarting and/or a clean reinstall of the app, it'd be great if you'd give disabling Background App Refresh a shot: this could be found under Settings -> General -> Background App Refresh.
Thanks! We’ll keep you posted and let you know as soon as we have any updates on this.
There’s a new version (8.6.64) of Spotify available in the App Store. The latest version includes fixes and improvements that should eliminate the stability and performance issues affecting a subset of iOS users.
If you have automatic updates switched on, you should have the newest version shortly. If not, you’ll have to update the App manually. You can find step-by-step instructions for updating Spotify here.