Apple has released the fourth beta of iOS & iPadOS 13.1 to the beta testers

The iOS & iPadOS 13 SDK provides support for developing apps for iPhone, iPad, and iPod touch devices running iOS & iPadOS 13. The SDK comes bundled with Xcode 11 beta available from Beta Software Downloads. For information on the compatibility requirements for Xcode 11, see Xcode 11 Release Notes.

Warning

If your watch is running watchOS 6 beta, you must update it to watchOS 6 beta 2 or later before updating to iOS 13 beta 7 or later, otherwise your watch will no longer be able to connect to your phone. (52854192)

General
Known Issues
Snapshots for apps that use Metal might have an unexpected appearance in the App Switcher. (53121694)

Deprecations
The UIApplicationExitsOnSuspend key is no longer supported in iOS & iPadOS 13. Update your apps to handle modern multitasking. (43958234)

  iOS and iPadOS 13.1 Beta 4 released