We are aware of an issue in iOS version 3.18 of the Calm app, where the app may freeze when changing Music tracks. This may happen when tapping the 'next' or 'previous' buttons on the session player, or if you have autoplay enabled on Music.
We apologize for the inconvenience! We have released a fix for this in version 3.18.1 of the app. Please update your app to resolve the issue.
If you do encounter this freezing issue when using the app, hard-quit and return to the app to restore functionality.